Strategic Foreign Direct Investment in Developing Countries Under Demand Uncertainty: Commitment vs. Flexibility

The paper analyzes the effect of expected future demand on the investment decisions of multinational enterprises. In particular, I explore the issue of the timing of switching between exporting and FDI in the host developing country and explicitly incorporate the firm’s attitude toward risk in the model. The model demonstrates that the optimal time for switching to FDI depends on the expected future demand and the degree of its uncertainty.


I. Introduction
In the presence of uncertainty about the future prosperity of an economy, timing of investment arises as a main issue for potential new entrants into the market. Particularly when the information on market demand is incomplete, firms have incentive to delay the investment until the uncertainty is resolved. This situation is more often observed among foreign multinational enterprises than domestic firms because, in general, MNEs have less experience and knowledge in predicting the future profitability of a new market. To gain a better idea on the demand of a host country, MNEs tend to begin by exporting to a new market rather than foreign direct investment. Case studies support this idea that export leads FDI. Survey results suggest that 69% of the firms in their sample exported to Australia before serving the market via FDI (Nicholas et al. 1994).
In general, when transportation and other transaction costs of trade are significant, export usually incurs a higher marginal cost of supply than production resulting from FDI. Particularly when transaction occurs between the North and the South, variable costs (major components are labor costs in many cases) of production in high-income source country will exceed those in low-income countries. On the other hand, to serve the foreign market through FDI, the MNE may have to bear the higher fixed cost (most of them are irreversible sunk cost) of investment than export though some fixed cost of exporting will be incurred in establishing a distribution network in the host country (Buckley and Casson 1981). Thus, a firm in a foreign market has to choose the mode of entry based on this trade-off. Export is chosen as a means to reduce the risk of investment regarding high sunk costs and potential loss from low demand. As market grows rapidly, however, there comes time when market demand reaches a sufficiently high level to make incurring sunk cost worthwhile, and a MNE has an incentive to build a plant in the foreign country instead of exporting.
Deciding when to switch to FDI could be affected by the uncertainty of demand and market structure as well as the level of demand. The presence of sufficiently large uncertainty generates an option value of waiting. Firms will hesitate to switch to FDI even when they expect demand to hit the threshold level for investment. On the other hand, for a small uncertainty, MNEs have incentive to move first to preempt the market. Firms face a trade-off between commitment by FDI first and flexibility by a wait-and-see strategy.
The purpose of this paper is to propose an explanation of the strategic behavior of MNEs headquartered in developed country with respect to the switching time from exporting to FDI under demand uncertainty in a host developing country. Our model accounts for how the timing and mode of entry strategically chosen 1 by identical firms can persist as equilibrium by reference to key variables without assumption on exogenous heterogeneity across MNEs. 2 Various sources of uncertainty can affect the investment decision-uncertain cost of production, unexpected political regime change, or factors associated with the goal of FDI. Dunning (1993) suggested that motivation of FDI can fall into four categories: market-seeking, resource-seeking, efficiency-seeking and strategic assetseeking FDI. Among these, we pay attention to the market-seeking FDI, and assume 1 Rob and Vettas (2003) explore entry into a foreign market with uncertain demand growth, but strategic behavior is not considered in the model. 2 Helpman et al. (2004) show that heterogeneity across firms such as productivity and firm size significantly influence the tendency of firms to substitute FDI for export. In our model, we assume higher productivity of MNEs over domestic firms as initial condition while MNEs within industry are homogeneous. This assumption allows different approach from the argument that within-sector heterogeneity may be an important determinant in organization of the firm.
ⓒ 2012 Journal of East Asian Economic Integration that the uncertainty originates from the unpredictability of demand side rather than cost side. 3 This paper contributes to the literature in several ways. First, it demonstrates that the uncertainty plays a crucial role for the occurrence of endogenous sequential FDI. Only a few articles deal with strategic FDI under demand uncertainty. Most of the related literature does not consider uncertainty (Horstmann and Markusen 1987;Buckley and Casson 1981), FDI (Maggi 1996, Pacheco-de-Almeida andZemsky 2003;Sadanand and Sadanand 1996) or strategy between multiple firms (Das 1983, Saggi 1998Itagaki 1991;Ziacik 2001;Yu, Chang and Fan 2007). Second, the firm's attitude toward risk is explicitly incorporated in the model. Although the uncertainty may have more negative effects on investment decisions when firms are risk averse than risk neutral, the importance of this rationale is hardly discussed in the related literature. In this paper, firms pursue maximizing Constant Absolute Risk Aversion (CARA) utility function. The result suggests that the strategic behavior of duopoly depends on demand and the joint role of uncertainty and risk aversion. 4 The remainder of the paper is organized as follows. Section 2 discusses the related literature. In section 3, we explore the firm's behavior in a monopoly case as a benchmark case. Section 4 sets up the model and analyzes the equilibrium of duopoly switching time game. Section 5 draws out the implications of the model and concludes.

II. Literature Review
This section relates this paper to existing literature. First, the basic set up of our model borrows the idea of trade-off between exporting and FDI from Buckley and Casson (1981). They analyze optimal timing of switching from exporting to FDI based on NPV (net present value) method, incorporating the costs of servicing the foreign market. As market size increases, the firm that begins by exporting will finally switch to FDI at some point. Here, set-up cost (the cost of transferring technology to the foreign subsidiary) plays a crucial role in postponing time to switch, but not permanently. Their model is one of a few pioneers that attempted to study timing of the switch from exporting to FDI. Their simple assumptions of one firm and no uncertainty are relaxed in this paper. Horstmann and Markusen (1987) provide conditions on cost structure and technology of multinationals to result in the situation where MNE-domestic production or solely domestic production arises as equilibrium. MNE will emerge in industries in which firm-specific costs and trade costs are large relative to plant-specific costs. High plant-level fixed costs discourage the incentive for centralized production and serving the host country via exporting. Firm-specific activities include organizational activities, advertising expenditures, research facilities and marketing that give a MNE a cost advantage over domestic producers. The firm-specific costs may arise from headquarters services and R&D (Markusen and Venables 2000). In our model we use this concept to set the basic assumption that MNEs from a developed source country have firm-specific advantage over domestically owned firms in a developing host country. But the relative magnitude of firm-specific costs to plant-specific costs is not one of main interests in our model, since firms must have already incurred firm-level fixed costs when they built headquarters in the source country before starting export. It may be more applicable for the case with the firm in its initial stage of organization that cost structure is an important factor in decision making.
Second, the implication of our model can be compared to the industrial organization literature addressing timing issues in investment under uncertainty, despite the different approaches. Maggi (1996) emphasizes the role of uncertainty as a source of asymmetric equilibria when two firms are in the market. If the profitability of a market is uncertain, asymmetric outcome can arise even if firms are ex ante identical and have symmetric entry opportunities, provided that irreversible investment has preemptive value, and if and only if capital levels are strategic substitutes. Maggi's model builds on the similar implication of our model in that investment timing could be endogenously determined without using other exogenous conditions such as heterogeneous firm size and technologies. This suggests that introducing uncertainty can yield the implication contrary to the folk theorem which implies that oligopolies are best modeled by Cournot equilibria under the assumption that firms are of equal size, and by Stackelberg equilibria in the presence of different firm size. But this paper contrasts to Maggi's paper in that it extends the case of ⓒ 2012 Journal of East Asian Economic Integration domestic firms to MNEs involved in international trade. Here, exporting substitutes for the wait-and-see strategy often used in other existing literature, but in fact, exporting gives a more powerful option value than delaying-strategy. By remaining an exporter, firms in our model do not have to invest after the uncertainty is resolved, allowing many possible ways in which entry strategy can evolve; this does not arise in Maggi's model in which export is absent.
Pacheco-de-Almeida and Zemsky (2003) develop a theory of investment under uncertainty when a clear lag exists between investment and production. Allowing time-to-build creates the equilibrium in which the follower invests in both periods. Their benchmark model setting and the implication of the equilibrium is approximately close to our model. If the uncertainty is sufficiently large, the unique equilibrium is both delaying investment, while it is leader-follower equilibrium for small uncertainty. However, Pacheco-de-Almeida and Zemsky do not deal with tradable goods produced by MNEs and their equilibrium is mainly affected by time-to-build, which is not a major issue in this paper.
In Sadanand and Sadanand (1996), both uncertainty and relative firm sizes play crucial role in determining equilibrium. Instead of investment decision as modeled in other literature, they study the timing of irreversible output decisions, where the first-mover advantage is due to the early output decision made by a committed firm in the first period while the other firm defers its output decision and choose its quantity in period 2. Their model suggests that with moderate uncertainty in demand, the larger the disparity in sizes between two firms, the more likely it is that larger firms become Stackelberg leaders and smaller firms are followers. For sufficiently small uncertainty, the Nash equilibrium consists of leader-follower equilibrium even under the assumption of identical firm size. But if the uncertainty is large, this asymmetric equilibrium is replaced by a symmetric Cournot equilibrium where both firms enter the market at the same time. Specifically, Sadanand and Sadanand propose the same idea in explaining identical firms' behavior under small uncertainty with the model of this paper. As in Maggi's paper, however, trade is not modeled in their paper, while it is one of distinctive features in our model. In section 4, we compare the characteristics of equilibrium of our model to theirs.
The third strand of papers deals with FDI decision in the face of uncertainty, but strategies among multiple firms are absent. In his article, Saggi (1998) analyzes a two period model of one firm in the face of switching from exporting to FDI under demand uncertainty. He argues that FDI can occur only when learning from exporting reveals that the market is large enough to support FDI. If the sunk cost as a fraction of fixed cost is not too high, the firm could switch back to exporting ⓒ Korea Institute for International Economic Policy in case of low demand. From the role of exporting as a learning process, even a small fixed cost can easily deter FDI as a natural consequence of his model's assumption. In our model, firms are involved in exporting before they face change of market demand, but demand uncertainty is resolved by nature. In addition, the concept of uncertainty differs between two models. In Saggi's model, the uncertainty about demand is represented as the probability that the true value of demand parameter turns out to be either a low value or a high value without reflecting the variability of demand. To the contrary, in our model, the unpredictability associated with attitude toward risk, independently of the level of demand, plays a crucial role in explaining firms' behavior.
Using a different approach and model set-up, Itagaki (1991) develops the model of MNE; FDI is not endogenously chosen, but is initially done by the firm and exporting is an option in the second period. The basic assumption is that a multinational firm maximizes the expected utility of total global profit over domestic output and host country output, and international trade occurs only between MNE's parent firm and foreign subsidiaries. The main results suggest that efficient allocation of capital is still achieved under demand uncertainty in the presence of an MNE, but a risk-averse MNE may invest less and produce less total output than a risk-neutral MNE. The effect of firm's risk-averse nature on resource allocation introduced in Itagaki's article is applied to our model. In his paper, however, timing is not explicitly modeled and international trade does not refer to trade as a substitute for FDI; it is only arm's length transaction in his model.
The main issue addressed in this paper can be compared to Smets' (1993) model. The major implication of duopoly case has a discrepancy between two models, whereas it is quite similar for monopoly case. The main motivation of FDI in his paper is relatively low wage of production in the East (low-income host country) compared to the West (high-income source country). Using optimal stopping time model approach, Smets argues that the presence of uncertainty creates an option value of waiting for the follower, allowing the leader to preempt the market. This idea is also proposed by our model in which sequential leader-follower equilibrium develops endogenously due to the uncertainty about demand. In Smet's model, however, higher uncertainty will make asymmetric equilibrium more likely. Moreover, the sequential FDI occurs only if demand is sufficiently low compared to investment cost. The intuition behind this argument is that if demand is sufficiently high, both firms will be involved in FDI and first-mover advantage will disappear, and vice versa. This implication is a contrast to our model. In our model, asymmetric FDI equilibrium occurs only for sufficiently low level of uncertainty and sufficiently ⓒ 2012 Journal of East Asian Economic Integration large demand. The presence of uncertainty matters because it causes the sequential movement game, but the magnitudes should be small in order for the leader to invest earlier. The difference may be due to the assumption of his model that firms can collude on the timing decision though not on output decision. In this paper, except the assumption of Cournot leadership game, the possibility of cooperative outcome is excluded, which prevents simultaneous FDI equilibrium in the first period.

III. Benchmark Case: Monopoly
Initially, we consider the case with a monopoly as our benchmark model. The entire market share of a foreign country is assumed to be dominated by one multinational enterprise. In the presence of uncertain demand, there are four periods: t = 1 through t = 4. The first period is the time to make an investment decision. Before t = 1, the firm is an exporter. At the beginning, the firm faces decision on whether to switch to FDI or to wait based on its belief on demand parameter.  denotes a true demand parameter, and is assumed to be constant during period 1 through 4, though it may be changed from period 0 to 1. Under uncertainty,  is unknown to the firm at the first stage (t = 1). The uncertainty is resolved during t = 2 and is observed by the firm. In the third period (t = 3), the firm decides whether to invest, if it did not invest at t = 1, or to keep exporting. At t = 4, the firm will produce output via FDI or exporting. Note that the duration of each period may vary across periods. For example, delay in making an FDI decision may be only temporary if the second period is very short: if  is revealed shortly. The inverse demand function is where p is the price of the good,  is an intercept term, x is an output produced by monopolist at t = 4.      , where  is an expected demand parameter and  is a disturbance term, where the variance 2  represents the uncertainty about demand. Given the assumed distribution of  ,  is normally distributed-) , ( 2   N . FDI incurs initial fixed cost F and marginal cost is assumed to be zero, while exporting incurs marginal cost of production, c. Focusing on the determinant of the investment decision, we assume that the goal of the firm is to maximize its expected value, not its profit. The key assumption in this section is that the monopolist is risk averse. Although the uncertainty about demand may not directly lower the firm's expected profit, it will ultimately discourage the investment decision ⓒ Korea Institute for International Economic Policy because a firm wants to avoid uncertainty of incurring potential loss in relation with sunk cost. To reflect the firm's concern about the negative effect of uncertain demand, the objective value function includes the variance of profit multiplied by risk aversion as an additional term. The firm's expected value EV is expressed as 5

EV EV EV 
Naturally, we assume that the expected demand parameter is greater than costs; otherwise, both exporting and FDI will never be profitable. In the sections that follow, we will start from the simple case of perfect foresight and will further analyze the case of uncertain demand.

Perfect Foresight
We assume that at the time of investment decision, the monopolist has full information about future demand. In the absence of uncertainty, there is no role for multiple stages because waiting does not have option value; there is no difference between payoffs across different periods under a monopoly. Thus, the firm's choice is whether or not it will switch to FDI. The firm will choose the quantity of output that will maximize its expected ex ante payoff of FDI or exporting. The firm will invest if its expected payoff of FDI exceeds that of exporting, and it occurs when the demand parameter exceeds a certain level. Taking expectation, 6  

Uncertain Demand
With uncertainty about demand, contrary to the previous section, there is a possibility that investing is more costly in period 1 rather than period 3 because of irreversible sunk cost and risk aversion of the firm. Thus, there exists an option value of waiting and the role for multiple stages. If we assume that there is no potential entrant to the host market in any stage, there is no strategic preemptive value from investing earlier before the true demand parameter is observed. The incumbent firm does not have incentive to switch to FDI in period 1 unless the expected demand is large enough to satisfy The proof of above inequality is as follows. In the presence of uncertainty, the monopolist's expected value from exporting . The condition (2) holds for 2  >0 and the equation (1) can hold for the case of perfect foresight where 2  = 0.
As with the case of certain demand, (2) holds for uncertain demand; if demand hits the threshold level of demand to switch to FDI, the firm will invest in period 3. If the uncertainty is high, however, it will be more difficult to expect that demand will be above the threshold level demand and the firm is more likely to choose to wait in period 1 and make a decision on entry mode at the third stage, depending on the level of revealed true demand. (Note that production is not assumed to take place until t = 3.) To sum up, compared to the case with perfect foresight, the uncertainty may delay monopolist's investment process.

IV. Model: Duopoly
Under a duopoly, firms are engaged in strategic decision making. As in the ⓒ Korea Institute for International Economic Policy benchmark case, we will analyze a firms' choice first under certain demand and later under uncertain demand.

Perfect Foresight
When perfect foresight is assumed, firms are engaged in game under no uncertainty about demand parameter.

1) Assumptions
 Two firms are identical MNEs: homogeneous in technology, cost function, location of headquarter and plants, productivity and size. Firms are assumed to be equally risk averse. They are multinational enterprises that have experience of FDI in other countries, but they have been only exporting to the specific host country in our model. We do not consider the possibility of taking the host country as FDI-platform for re-exporting to the third country. 7 FDI in this paper refers to the circumstance where MNE builds the branch plant in the host country to produce and sell the same product as they exported to the host country consumers.  We do not consider domestic firm as a potential entrant in the model. MNEs are assumed to take entire market share of an industry of a specific good x which can be produced only by MNE's own superior technology and firm-specific activities (Horstmann and Markusen 1987). The MNEs' firmspecific advantage is often identified as entry barriers to domestic firms. 8  The inverse demand function is assumed to be where p is the price of the good,  is an intercept, i x is an output produced by firm i, and x j is output of firm j. 7 The relationship between FDI and exporting may be either substitution or complementarity. Head and Ries (2004) suggest that empirical evidences supporting the complementarity from vertical linkages between upstream export and downstream FDI do not contradict the theoretical prediction of substitution at product level. 8 For example, the Canadian beer multinational Hiram Walker could maintain market share and successfully restrict entry of competitors to U.S. beer market by establishing extensive networks of distributors using their internationally recognized brand names (Rugman 1986). Both firms are involved in pure strategy game: the probability of choosing strategy is one or zero. Each firm is maximizing its expected value EV which is expressed 9 as and 2  = 0. Without further assumption that one firm is to be a leader while the other a follower in FDI, there is no role for multiple stages. Their entry modes are either switching to FDI or exporting in the same period. Thus, the game is a simultaneous move game and firm i decides on the mode of entry based on its belief about firm j's choice on entry mode.

3) Equilibrium
In the duopoly model, the strategy pair * * , ) where h k =switch to FDI, or export by player (

, ) h i or j 
and h x is an expected output produced by firm h. Given FDI by firm j, firm i's strategy is to choose entry mode that can satisfy From the assumption about the identical firms, this occurs to firm j's strategy symmetrically. Likewise, given no FDI by firm j, firm i's choice is to switch to FDI or keep exporting according to x . This strategy is also applied to firm j.
Depending on firm's strategies, three different scenarios are plausible. 10 ⓒ Korea Institute for International Economic Policy  Both firms switch to FDI.
 At t = 1, one firm is engaged in FDI while the other firm remains an exporter.
In the simultaneous duopoly game with no uncertainty of demand, let parameter  be determined as a solution to equation (3) when firm j is expected to invest.
Also, let parameter   be determined as a solution to equation (4) when firm j is expected to export.
Then, it is straightforward to show that Proposition 1  For    in the simultaneous duopolistic game, there is a unique Cournot-Nash equilibrium in which both firms invest.  For       , there exist two Nash equilibria; one firm switches to FDI and ⓒ 2012 Journal of East Asian Economic Integration the other firm remains an exporter.  For     , there is a unique Nash equilibrium, in which both firms choose to keep exporting. See Appendix 3 for proof.

Uncertain Demand
This section explores the strategic choices between two MNEs on optimal timing to switch to FDI. In contrast to the benchmark model of a monopoly, where a firm does not invest in period 1 under uncertainty, for small uncertainty, each firm in the duopoly model has an incentive to invest earlier than its rival to preempt the other firm.

1) Assumptions
 The assumptions on the nature of two MNEs are same to section 4.1.1. Two firms are identical MNEs: homogeneous technology, cost function, location of headquarters and plants, productivity, and size. Firms are assumed to be equally risk averse. The possibility of taking the host country as FDI-platform for re-exporting to the third country is excluded.  We do not consider domestic firm as a potential entrant in the model. MNEs are assumed to take the entire market share of an industry of a specific good x which can be produced only by MNE's own superior technology and firm-specific activities.  The inverse demand function is assumed to be where p is the price of the good,  is an intercept, xi is an output produced by firm i, xj is an output of firm j. Contrary to the assumption of extensive literature on investment timing (Sadanand and Sadanand 1996;Pal 1991;Mailath 2003;Maggi 1996;Daughety and Reinganum 1994) that investments are immediately productive, we assume that production lags the investment decision period. As often described in typical examples of the Stackelberg leadership model, a leader has a first-mover advantage over the follower by limiting the follower's output relative to what it would have been in a simultaneous Cournot equilibrium. Temporal asymmetry from a sequential move game results in a larger profitability for the leader. With this assumption, under high demand, early investment will lead to more profit for a ⓒ Korea Institute for International Economic Policy leader than that for a follower. When there is a sufficient amount of uncertainty, however, it is possible that a risk-averse follower's expected payoff is greater than that of the leader, distinguishing the result of our model from the conventional Stackelberg model in which the leader's payoff is always higher than the follower's. For simplicity, we assume that all fixed costs are sunk.  As before,      represents demand parameter for the firm's product.  Timing of players: We assume that the game has four periods; t = 1 through t = 4. The true   is constant over t = 1 through t = 4. It is assumed that at t = 0, both firms have been exporting. At t = 1, each firm faces the decision whether to switch to FDI or take a wait-and-see strategy based on its belief about the expected value of the demand parameter as a function of belief about the other player's expected payoff. The decision to invest incurs sunk cost.
By assumption,   is uncertain at t = 1. The uncertainty is resolved at t = 2, when   is observed and becomes common knowledge. At t = 3, firms make the choice whether to invest or remain as exporters, provided they did not switch to FDI during the first period. In this period, firms that committed to FDI start producing. In the fourth period, firms that made late decision on entry mode produce output. The amount of production depends on the firms' decision in the earlier periods. The firm that switched to FDI first is assumed to be able to produce output before the follower produces. Thus, leader-follower relationship in investment holds for the relationship between two firms in producing output.  The expected value functions 11 of firm h are defined as where F is FDI and e stands for export, and where l denotes the leader and f denotes the follower. The firm's profit ˆh  is expressed aŝ x is a product of FDI and exporter respectively.

2) Game
Period 1: Decision on early FDI As with the case for perfect foresight, the firms are engaged in pure strategy game. If a firm switches to FDI based on its expectation on higher demand, it has to incur a sunk cost at t = 1. Since the sunk cost is assumed to be irreversible, it has two effects. On the one hand, as is demonstrated by Dixit (1979), the commitment to irreversible investment generates a first-mover advantage; a preemptive value, since the leader's sunk cost is a signal of commitment to FDI in the future, the follower takes its rival's output as given and the resulting profit of the leader will outweigh that of the follower by taking larger market share. Thus, the preemptive value urges firms to invest earlier than their rivals. In our model, however, firms are not assigned to be a leader or a follower at the beginning because they are identical by construction. When leadership equilibrium is the equilibrium, one firm happens to be a leader, while the other firm is a follower. Firms can opt for three types of behavior. One firm either chooses FDI in period 1, waits and invests, or waits and exports at t = 3. On the other hand, combined with the irreversible sunk cost, uncertainty creates an option (flexibility) value of waiting for FDI. In the case of switching to FDI in period 1, the firm may lose the opportunity to invest in the foreign market later at second period under possibly a more favorable environment: if actual   turns out to be high, at t = 3, the firm can decide to switch to FDI or to keep exporting otherwise. Thus, the high uncertainty of demand in the host country will make waiting option more attractive: the higher the uncertainty, the higher the option value of waiting. When a firm chooses FDI in the first period, to compensate for the loss of option value, the expected demand should be sufficiently high as the uncertainty increases. Period 2 and 3: Choice of nature and the late decision on entry mode At t = 2, the uncertainty about demand is resolved. Based on the realization of  , the leader at t = 3 makes decision on output and produce and the follower in t = 3 can choose either to invest or continue to export. In case of sequential entry, the output of the first mover is set after it observes the realized demand parameter. Since it is already committed to FDI in the first period, it will still act as a leader even if the true demand parameter turns out to be lower than expected. Taking this leader's output as given, the follower will make output decision. If both firms ⓒ Korea Institute for International Economic Policy do not invest in period 1, their choice at t = 3 is either to switch to FDI simultaneously or keep exporting depending on the level of  , and each firm will set their output taking its rival's output as given.
Period 4: Production period At t = 4, a follower in FDI or export starts producing and the profit is realized.

3) Equilibrium
In this section, we describe the Nash equilibrium of subgame and Subgame Perfect Nash Equilibrium (SPNE) of the full game by backward induction. Conditional on FDI decision on the output committed to by the firm which chose to invest, and on the realized value of  , a Nash equilibrium of a subgame is defined. Denote by , the subgame reaction function of firm h to its rival's strategy. A Nash equilibrium of a subgame starting at t = 3 is a combination of the firms' strategies that generate a pair of outputs * * ( , ) h h x x  that is determined by the intersection of the two subgame reaction functions. If there is no FDI by both firms in the first period, there can exist three different equilibria of the subgame. Provided that firm j waits and invests, firm i's best-response function of FDI is then Firm i will take into account firm j's reaction function in determining its own output at t = 3, i.e., firm i solves ( ) intersection between two reaction functions produce asymmetric leader-follower outcome ˆ( , ) 2 4   . If firm i invests at t = 1 and firm j waits and chooses to export, firm j's best response function given firm i's output is where h k = FDI at t = 1, FDI at t = 3, or export by player ( , ) h i or j  and ˆh  is a random profit that will be realized after the true demand parameter is revealed. Given no FDI by firm j at t = 1, firm i's strategy is to choose entry mode and timing of action that can satisfy according to parameter values. 13 From the assumption about the identical firms, this occurs to firm j's strategy symmetrically. Likewise, given ex ante FDI by firm j, firm i's choice is to switch to FDI at t = 1, t = 3 or keep exporting according to This strategy is also applied to firm j. Below, we define two types of ex ante FDI by the timing of entry via FDI.

Definition 2:
We say firm i commits if it invests at t = 1 and it delays investment if it waits at t = 1 and switches to FDI at t = 3.
In a Commit-commit equilibrium, both firms switch to FDI in the first period. In a Commit-delay equilibrium, one of the firms commits, while the other firm delays FDI. In a Commit-export equilibrium, one of the firms commits, while the other waits and exports in the third period. In a Delay equilibrium, both firms delay investments until t = 3. In an Export equilibrium, both firms wait and export at t = 3, and in a Delay-export equilibrium, one firm waits and invest and the other firm waits and exports at t = 3. Expected payoff, , both firms wait and export in the second period, i.e., Export equilibrium. See Appendix 5 for proof.
Interesting features are worth noting in the analysis of equilibrium. All sequential move equilibria (Commit-Delay or Commit-export equilibrium) occur for small amounts of joint value of uncertainty and risk aversion. In particular, Commit-Delay is an equilibrium strategy for sufficiently large demand and small uncertainty. Commit-export equilibrium is SPNE for    as long as the uncertainty and coefficient of risk-aversion is small. In contrast, except Commit-Commit equilibrium, all simultaneous move equilibria (Delay equilibrium, Delay-export equilibrium, or Export equilibrium) exist under sufficiently large uncertainty. This implies that the choice of the timing of action is mainly affected by the effects of uncertainty about demand and the firms' attitude toward risk. Note that the effects are joint effects of two factors; the amounts of value may be due to the level of uncertainty, the level of risk-aversion, or both.
Regarding the choice on the mode of entry, besides timing, the result of this section can be compared to the benchmark case of monopoly. As a natural consequence of trade-offs between higher marginal cost of exporting and the irreversible plant-level fixed costs of FDI, a monopolist will switch to FDI only when demand is sufficiently large, remaining an exporter otherwise. For a duopoly game, however, a firm can choose commitment to FDI even under smaller demand parameter conditions than are required in the monopoly case, given the uncertainty is small and the other player is believed to keep exporting as a follower (See proposition 2. case (9)). For the monopolist to invest in the first period, the threshold level of demand is high and the expected demand should be substantially high enough to compensate for the opportunity loss of option value of waiting created by uncertainty. In duopoly's case, however, the loss of option-value can be offset by the gain from preemptive-value which is also created by uncertainty. Even for a small demand, preemptive-value by commitment to FDI can bring a larger profit for a leader by limiting output and profit for the follower, thus a firm has an incentive to switch to FDI given the other firm waits.  , the export region will shrink. Likewise, under the assumption of Cournot leadership, the commit-commit equilibrium region is determined by the amount of joint effect of uncertainty and risk aversion  These results are also compared to Sadanand and Sadanand (1996). Their two-stage duopoly model implies that, for sufficiently small amounts of uncertainty, asymmetric leader-follower equilibrium may arise, partly supporting the argument of proposition 1 and 2 in this paper. However, their result contrasts the exclusion of symmetric equilibrium under small uncertainty in our model. In S&S, symmetric Cournot equilibrium at t = 2 occurs at any amount of risks, while in our model, it obtains usually when the uncertainty about demand is sufficiently large. For a small uncertainty, the symmetric equilibrium is replaced by leadership equilibrium in our model.

V. Conclusions
In this paper, we analyze exporters' decision on switching time to FDI for given condition of market structure, demand parameter, and uncertainty. In our model, the uncertainty about demand determines the nature of the game. In the absence of uncertainty, there is no option-value of waiting that Nash equilibrium consists of simultaneous-move equilibrium and the demand level is the only criterion for ⓒ 2012 Journal of East Asian Economic Integration investment decision. We find, however, that introducing uncertainty creates both option-value of waiting and preemptive-value of commitment, and thus the game has multiple stages and the trade-offs between two values affect the equilibrium of the game. The low level of uncertainty to the switching time model of duopoly increases the preemptive-value of commitment that can allow asymmetric sequential equilibrium to occur as subgame perfect Nash equilibrium. Here, of course, firms should not be overly risk averse. The more risk averse the firm is, the less likely that a firm has an incentive to preempt the market even for a small uncertainty. Symmetric Cournot-type equilibrium is derived if the uncertainty is sufficiently high (This argument is visually summarized in Figure 1).
Our model can be extended in several ways. First, we assume that entry barrier in oligopoly can be maintained by MNE's firm-specific advantage over domestic firms. But what if the domestic firms in developing countries can catch up with MNE's technology and penetrate the market through learning or knowledge spillovers from inward FDI? 15 It might be an interesting extension, if MNEs are assumed to face the potential threat of entry by domestic firms, though the analysis could become more complicated. Second, introducing a learning process to obtain knowledge about demand can alter the result of the model. For simplicity of the analysis, this paper assumed that firms are involved in rational expectation and the demand uncertainty is resolved by nature in the second period. If the uncertainty is assumed to be resolved only through learning-by-FDI (either by rival or the firm itself), the equilibrium is likely to be determined depending on the probability of deviation of an estimation from the true value. Third, firm productivity may affect the timing of FDI. In their empirical analysis, Mühlen and Nunnenkamp (2009) find that firm productivity matters for self-selection of FDI by German firms while it declines over time with diminishing uncertainty in the Czech Republic. Incorporating firm heterogeneity into the optimal timing of FDI 16 under uncertainty may provide rich implication for industrial reallocation. Lastly, provided that information on the timing of investment conducted by two rivals are available in firm level data, the application of our theoretical background to empirical test will generate strong support for our model.

Appendix 1: The Derivation of a Monopolist's Problem
When we assume CARA (Constant Absolute Risk Aversion), the monopolist's problem with respect to FDI output becomeŝ where r is a coefficient for risk aversion.   (1) and (2) (3) and (4)

From intersection between reaction function
From intersection between reaction function (5) and (6) ( 2 ) 9 9 from the parameter condition    and equation (3). This relationship holds also when firm i believes that firm j will export. That is, FDI is a dominant strategy. Firm j thinks the same way as firm i does. Thus, both firms choose to invest.

2) From equation (3) and for
given firm j invests. Thus, firm i has no incentive to switch to FDI and it will choose to remain an exporter if firm j is expected to invest. From     and equation (4), however, FDI will be preferred by firm i given its rival keeps exporting: 2 ( ) 9 3) In this case, demand level is sufficiently small that exporting is the dominant strategy of each firm. Given firm j invests, 2 2 ( 2 ) 9 9 Given firm j exports, 2 ( ) 9

Appendix 4 : The Derivation of Expected Value in Duopoly Game
For Commit-delay equilibrium, the leader i and follower j's expected values are obtained based on their expectation on the future profit incorporating belief about rival's decision.
Taking firm i's output as given, firm j determines its output by solving Considering firm j's reaction, firm i will make its output decision by solving EV > e i EV holds and firm i has an incentive to invest in the first stage given firm j remains an exporter at t = 3. Strategically, the firm j will think the same way as firm i would, its choice on entry mode is to be a FDI follower given firm i being FDI leader, FDI leader given firm i FDI follower or an exporter. Therefore, ⓒ Korea Institute for International Economic Policy two SPNEs are that one firm invests as a leader in FDI and the other firm follows its rival in FDI at t = 3.
2) Assuming Cournot-duopoly game instead of warfare when both firms are engaged in FDI as leaders, the expected value of commitment to FDI in the first period can be modified as Thus, firm i's strategy is to invest in the host country at t = 1. Similarly, when firm i expects firm j to choose to be a FDI follower, its best response is to invest prior to its rival. Strategically, the firm j will think the same way as firm i would, its choice on entry mode is to be a FDI leader regardless of its belief on the strategy of its rival. Thus, the subgame perfect Nash equilibrium is a Commit-commit equilibrium.
ⓒ 2012 Journal of East Asian Economic Integration 3) As in case 1) and 2), for     , export is dominated by wait-and-FDI strategy. , the expected variance of error term  in demand parameter is higher than the threshold level of variance that equates FDI leader's profit to FDI follower's profit under uncertainty, contributing to delaying in investment. Thus, under a sufficiently large uncertainty and large demand, firm i's strategy is to invest at the third period rather than to invest earlier given firm j waits and invest at the third stage.

Given j a leader,
When the rival firm j holds on and chooses to keep exporting in period 3, At t = 3 which is equivalent to the condition that 2   2 1 1   . Thus, given firm j exports, firm i's best response it to wait and invest later. Applying symmetry, the subgame perfect Nash equilibrium of the whole game is that both firms wait and invest in period 3. , Delay option at t = 3 is dominated by export strategy, since at t = 3, the expected demand is not high enough to make FDI more profitable than exporting: firm i's expected payoffs   EV and given firm j is a leader in FDI, firm i's strategy is exporting in the third period. However, taking firm j's choice to become a late investor or to remain as an exporter in period 3 as given, firm i's strategy is to invest in the first period since the gain from preemptive value over profit from waiting is sufficiently high enough to outweigh its profit loss from uncertainty. Given firm j investing at t = 3, and equation (5). As long as     , however, firm i has an incentive to invest rather than to export at t = 3 given firm j becomes a follower in FDI. This is because, at t = 3, firm i's expected payoff becomes  given firm j will choose FDI either in period one or three, export is dominant strategy over the late FDI for firm i, since the expected demand is less than threshold level of demand parameter for investment at t = 3:  . Given firm j leader, commitment to FDI will incur negative payoff for both players, thus export is firm i's best response. However, if firm i believes that firm j will invest later, it will prefer investing at t = 1 to exporting at t = 3 because even though  implies that firm i has an incentive to commit to FDI in the first period given firm j invests in the third period. Based on the belief that firm j waits and exports, , export is the dominant strategy of firm i over both ex ante and ex post FDI given firm j invests first. Given firm j commits to FDI at t = 1, firm i has an incentive to remain exporter since     ), the gain from being a FDI leader is lower than that from remaining an exporter:  EV and FDI at t = 1 is the best response for firm i given firm j exports. As firm j's strategy given firm i's strategy is determined in the same way, there are two Commit-export equilibria. Combining two parameter condition of uncertainty (  , given firm j invests at t = 1, firm i's strategy is to export at t = 3. The inference is exactly the same as the previous case 5). Given firm j invests at t = 3, commitment is dominated by waiting strategy and Delay option is dominated by exporting by firm i for the low demand as ( 2 ) 1 ln (1 9  . As a result, exporting is firm i's best response to late FDI strategy by firm j. However, firm i will choose to wait and invest at t = 3 if it believes that firm j will wait and export. Under this belief, demand is still high enough to switch to FDI from exporting that Delay option will dominate export strategy.  (1  ) , Delay option is dominated by exporting strategy because of the low demand parameter. Given firm j invests in the first period, firm i has an incentive to continue exporting, because  . If firm j is believed to invest in t = 3 after waiting, it is firm i's choice to become a leader rather than to become an exporter for small uncertainty based on the inequality