Evaluation of Manufacturing Competitiveness of Hubei Province Based on Stochastic Frontier Analysis

'e manufacturing level directly manifests the comprehensive strength of a country or region. Production efficiency provides an important metric of the competitiveness of the manufacturing industry. Based on the data of China’s industrial enterprises of 1999–2011, this paper estimates the production efficiency of manufacturing in Central China’s Hubei Province through stochastic frontier analysis (SFA) and thus characterizes the differences between prefectures of Hubei in manufacturing competitiveness.'e results show that, on the prefecture level, Xianning and Wuhan saw a decline in manufacturing competitiveness, while Xiangfan and Xiaogan witnessed an increase in manufacturing competitiveness. To enhance local manufacturing competitiveness andmake Hubei the forerunner and cornerstone of Central China, different prefectures should adopt different industrial promotion policies, pay attention to cultivating the technological innovation capabilities of enterprises, and strengthen the integration of production, education, and research.


Introduction
e manufacturing level directly manifests the comprehensive strength of a country or region. e competitiveness of the manufacturing industry directly bears on the function and depth of the country or region in the international division of labor. Since the subprime mortgage crisis, reshaping the manufacturing industry has become a global campaign to find new economic growth points. is campaign is launched against a new round of technological and industrial revolutions. To enhance the industrial competitiveness of Germany, Hannover Messe 2013 officially launched the concept of Industry 4.0 based on network entity systems and the Internet of ings (IoT). On February 19, 2016, the United States (US) Congress received the first strategic plan for the National Network for Manufacturing Innovation (NNMI), which is jointly submitted by the Secretary of Commerce, the Executive Office of the President, the National Science and Technology Council, and the Advanced Manufacturing National Program Office. is plan sets out an important goal: enhancing the competitiveness of American manufacturing in an all-round way.
In the meantime, China has entered a new stage of economic development. In the traditional manufacturing industry, the supply and demand are seriously imbalanced. It is urgent to reduce production capacity, inventory, and leverage through structural adjustments and lower costs and solve defects by transforming the production mode. In Government Work Report 2019, the Chinese government pledged to promote the high-quality development of manufacturing, accelerate the construction of a manufacturing power, facilitate the docking of standards with international best practices, improve the quality of products and services, and attract more domestic and foreign users to Chinese products and services. It is telltale that major economies regard enhancing manufacturing competitiveness as the core development strategy. Hubei is a large province in Central China. e manufacturing competitiveness of Hubei represents the manufacturing level in this region of the country and makes up an important part of Made in China 2025. erefore, it is of great significance to correctly estimate and evaluate the manufacturing competitiveness of Hubei. e relevant results help to improve the manufacturing competitiveness of the province and even across Central China, promote high-end brands that are made in China across the globe, and contribute to the sustainable development of trade and economy in the country.
Chinese and foreign researchers have explored industrial competitiveness extensively and reached fruitful results. Some of the most representative studies are as follows: (1) Industrial competitiveness: Porter, a renowned American economist, proposed the famous diamond model and believed that the industrial competitiveness of a region is affected by factor endowments, related industries, corporate strategies, external opportunities, market demand, and government policies, to name but a few [1].
Since the turn of the century, many new theories have emerged on industrial competitiveness. rough analytic hierarchy process (AHP), Sirikrai and Tang [2] analyzed industrial competitiveness from two aspects: strategy and operation management. Fetscherin et al. [3] held that the higher the degree of industrial specialization, the greater the share of the industry in global exports. Meleo [4] examined the impact of international events on regional industrial competitiveness from the perspective of external opportunities. Kleynhans [5] suggested that technology spillover has a significant positive impact on the competitiveness of enterprises and industries. Based on relevant data in Japan, Purwadi [6] found that human resource has gradually developed into an important influencer of industrial competitiveness. Liu [7] constructed an evaluation index system for the industrial competitiveness of Changsha-Zhuzhou-Xiangtan region and evaluated the industrial competitiveness by principal component analysis (PCA).
(2) Manufacturing competitiveness: the foreign studies on manufacturing competitiveness can be traced back to the 1960s. Many researchers have studied the factors affecting manufacturing competitiveness. Moreno [8] established a regression model to identify the determinants of Spanish manufacturing competitiveness. Wong and He [9] stated that technological innovation plays an important role in manufacturing development and the enhancement of manufacturing competitiveness. Purwadi [6] discovered that human resource is developing into a major impactor of manufacturing competitiveness in Japan. Hannigan et al. [10] learned that the competitiveness of different types of manufacturing enterprises varies with development strategies. Singh et al. [11] highlighted the importance of government support, new technologies, and investment to manufacturing competitiveness. Dong and You [12] analyzed the status quo of China's aerospace manufacturing from the angles of competitive strength, competitive potential, and competitive environment and established an evaluation system. (3) Evaluation of industrial competitiveness:some researchers measured international competitiveness of industries from the macro perspective, mainly using trade specialization coefficient (TSC), export market share (EMS), and revealed comparative advantage (RCA) [13][14][15]. Hannan et al. [16] measured industrial competitiveness with the RCA and concluded that the competitiveness of the auto industry is positively correlated with economic performance, human capital development, urbanization, and tariff level and negatively correlated with loan rate and carbon emissions. Carraresi and Banterle [17] adopted the EMS and RCA to measure competitive performance. Jin et al. [18] evaluated the international competitiveness of China's manufacturing industry in terms of market share and product profitability. Some researchers measured industrial competitiveness from the meso perspective. Since the 1980s, the World Economic Forum (WEF) and the International Institute for Management Development (IMD) in Lausanne, Switzerland, have been researching this topic and have formed a relatively complete competitiveness evaluation system. To evaluate industrial competitiveness, many Chinese scholars have probed into the evaluation index systems, formation mechanism, and empirical analysis of industrial competitiveness. For example, Wei and Wu [19] constructed an evaluation index system for competitiveness, which covers the following dimensions: industrial technological innovation ability, rational resource allocation ability, industrial growth potential, and market influence. Some researchers measured enterprise competitiveness from the micro perspective. On the microlevel, the enterprise competitiveness is mainly measured and compared in terms of production efficiency, market share, and enterprise scale. e relevant evaluation index systems primarily focus on production efficiency, enterprise scale, and market growth/scale. Firstly, production efficiency of enterprises is mainly measured by the nonparametric methods of data envelopment analysis (DEA) and stochastic frontier analysis (SFA) and the semiparametric method of Olley-Pakes (OP) production function. ese methods decompose production efficiency into an efficient part and an inefficient part, before comparing the level or magnitude of enterprise efficiencies. Papahristodoulou [20] used the DEA to analyze the cost performance of 121 different models produced by auto enterprises in different countries in 1996 and compared the market competitiveness of auto enterprises from different countries. With the aid of DEA, Oh et al. [21] evaluated the 2 Discrete Dynamics in Nature and Society cost performance of cars produced by Korean auto enterprises and compared the market competitiveness between auto enterprises in Korea. Secondly, enterprise size is mainly measured by the number of employees, gross output, and per-capita output of each enterprise. With these metrics, the scale and growth rate of each enterprise are determined and used to judge the competitiveness at the enterprise level. Considering the positive correlation between technological innovation and enterprise output, Melitz and Trefler [22] believed that a large enterprise tends to have a strong ability to engage in technological innovation and a strong export capacity.
irdly, market growth/scale is mainly measured by market concentration and locational Gini coefficient and used to characterize enterprise competitiveness. Li and Tang [23] held that market concentration has a significant positive effect on the competitiveness of large enterprises and evaluated the competitiveness of large enterprises from five aspects: scale, benefit, operating efficiency, debt repayment, and growth.
In summary, industrial competitiveness has been deeply explored in the academia, yielding a wealth of literature. e existing studies mainly deal with the influencing factors and evaluation of industrial competitiveness. However, there are several defects with these studies: there is not yet a consensus on how to define and estimate competitiveness, how to select the evaluation indices, and how to measure competitiveness. As a result, the existing methods have limited explanatory power on industrial competitiveness. Besides, there are not many reports on the competitiveness of enterprises in Central China, not to mention the manufacturing competitiveness of Hubei on enterprise level. Based on the data of China's industrial enterprises of 1999-2011, this paper estimates the production efficiency of manufacturing in Central China's Hubei Province through SFA, compared the difference between the 17 preferences of the province in manufacturing competitiveness, and fully discussed the interactions and fluctuations between the factors affecting the manufacturing competitiveness. On this basis, several countermeasures were proposed to enhance the manufacturing competitiveness of Hubei. e research results provide a solid basis for Hubei Province to transform its manufacturing industry, enhance manufacturing competitiveness, and realize high-quality development. e remainder of this paper is organized as follows: Section 2 establishes the model, explains the data sources, and selects the variables; Section 3 estimates the production efficiency of manufacturing enterprises in Hubei; Section 4 sums up the findings and provides the countermeasures.

Model Construction.
is paper selects the production efficiency of enterprises to measure the manufacturing competitiveness of Hubei Province. e measurement of production efficiency was pioneered by Farrel [24]. Currently, the popular ways to measure production efficiency include nonparametric estimation methods like DEA and parameter estimation methods like SFA. e nonparametric estimation methods are generally unstable in output and in need of high-quality data. By contrast, the SFA can both calculate the production efficiency of an enterprise with a suitable production function and reflect the impact of background variables (i.e., various environmental factors) on the explained variable (i.e., the production efficiency of the enterprise). erefore, the SFA was selected to estimate and measure the manufacturing competitiveness of Hubei.
e SFA model was proposed as early as 1977 by foreign scholars like Aigner and Meeusen. e basic idea of SFA is as follows.
Let f(z i , β) be the production function of enterprises and q i � f(z i , β) be the optimal production function of the i-th enterprise without random interference and efficiency loss. However, inefficiency is commonplace among enterprises. Normally, the actual output of an enterprise is smaller than its optimal output. us, the actual output of the i-th enterprise can be defined as where ξ i is the production efficiency of the i-th enterprise. e ξ i value inevitably falls within (0, 1]. If ξ i � 1, the enterprise utilizes the optimal technology of the production function f(z i , β); in this case, the enterprise can achieve the optimal output and boast the highest competitiveness. If ξ i < 1, the enterprise cannot fully utilize the inputs z i under the given conditions. Since q i > 0 (the output is strictly positive), there must exists ξ i > 0 (technical efficiency must be positive). Assuming that the enterprise output could be affected by random shocks, the output of an enterprise under random shocks can be expressed as Taking the natural logarithm of both sides: Suppose there are k kinds of inputs with linear logarithmic form, and u i � −ln(ξ i ). en, the output function under random shocks can be rewritten in logarithmic form as where u i is a subtracted term in the output logarithmic function. is term must be greater than or equal to zero, such that the enterprise efficiency meets the condition 0 < ξ i ≤ 1. In this case, function (4) is a stochastic frontier production function. On this basis, Kumbhakar and Lovell derived a dual production cost function in 2000: where c i is cost; q i is output; p ji is price of elements. e other variables are the same as above. If an enterprise is Discrete Dynamics in Nature and Society inefficient, the output will decline or the production cost will increase.

Data Sources and Variable Selection.
To measure the manufacturing competitiveness of Hubei from the enterprise level, the data on manufacturing enterprises of Hubei were extracted from China Industrial Enterprise Database (1999-2011) through the following steps. Firstly, rename all the variables named "Hubei Province" among the "province/autonomous region" variables, as well as the place names within the province, to "Hubei Province." For example, the variables named "Hubei," "Huangshi," and "Wuhan" were uniformly coded as "Hubei Province," after checking the "Administrative Region Code." In this way, all enterprises in Hubei were clearly identified as belonging to that province.
Secondly, extract the enterprises from "Hubei Province" after the renaming process. A total of 226 variables and 112,034 observations were extracted.
irdly, screen and sort out the variables. e main purpose is to delete the duplicate values and convert and sort out the attributes, numbers, and characters in the variables.
Fourthly, sort out the locations of the enterprises by four standards in turn: the "Area Codes" of Hubei, "Prefectural Codes" of Hubei, "County Codes" of Hubei, and "Enterprise Name." In this way, all enterprises in Hubei were allocated to the 17 prefectures. Table 1 lists the serial numbers of the 17 prefectures, i.e., the area codes of these prefectures.
Fifthly, allocate the enterprises in Hubei to the 17 prefectures according to the above classification. After removing the enterprises that cannot be allocated to any prefecture, the distribution of the enterprises is shown in Table 2.
According to the theory on enterprise competitiveness (i.e., the stochastic frontier production function), the main variables were extracted as follows: (1) Enterprise output: there are many ways to measure enterprise output. By tradition, this paper measures output with gross industrial output (g1911) in its logarithmic form (lg1911). (2) Enterprise inputs: the fixed infrastructure, labor, and labor training cost were measured by the mean balance of net fixed assets (g2123), number of employees (g2515), and human capital (g2416), respectively; these metrics were also expressed in logarithmic forms (lg2123, lg2515, and lg2416). Table 3 shows the descriptive statistics on the above variables.

Estimation Method.
According to the proposed function and variable definitions, the SFA model for production efficiency estimation can be established as It was assumed that u i obeys half-normal distribution, and v i obeys normal distribution. Table 4 lists the analysis results on the main variables, including the coefficients about how the output (lg1911) is correlated with number of employees (lg2515), mean balance of net fixed assets (lg2123), and human capital (lg2416).
e results show that the correlations are credible, nullifying the null hypothesis (the correlation coefficients equal zero) at the significance level of 1%. e production efficiency of manufacturing enterprises in Hubei was estimated in four steps: first, select and analyze the relevant variables of the production function; second, estimate and test the parameters of the SFA model based on the data of industrial enterprises in Hubei 1999-2011; third, estimate the production efficiency of each enterprise in the 17 prefectures and calculate the annual mean production efficiency in each prefecture; fourth, compare the manufacturing competitiveness between the 17 prefectures, with the annual mean production efficiency as the metric and draw the basic conclusions.

Parameter Estimation.
e parameters of the SFA model were estimated based on the enterprise data collected from China Industrial Enterprise Database (1999-2011). e estimated results are recorded in Tables 5 and 6. e following can be learned from the analysis results in Table 5.
First, the mean balance of net fixed assets had positive effect on the gross industrial output of industrial enterprises. e correlation coefficient was significantly different from zero in both equations. Hence, fixed assets like infrastructure promote the output of industrial enterprises. Besides, the correlation coefficient remained significant on the 1% level, suggesting that the mean balance of net fixed assets objectively influences the added value of industrial enterprises.
Second, labor had an immense impact on the gross industrial output of industrial enterprises. e coefficient of number of employees was significant, whether in ordinary regression analysis, cross-section SFA, or panel data SFA.
us, labor determines the added value of industrial enterprises in the long run.
ird, human capital also had a huge impact on the gross industrial output of industrial enterprises. e cross-section and panel data SFAs show that human capital had a significant coefficient. is means the enterprise expenditure on labor training determines the gross industrial output of enterprises.
Fourth, lnsig2u _cons and mu _cons were the p values reflecting that u i differs from the null hypothesis. e random interference term (u i ) in the SFA model was significantly different from zero. As a result, the random interference term clearly exits and objectively affects enterprise output. Discrete Dynamics in Nature and Society      To sum up, the estimation results of the SFA model parameters of manufacturing enterprises in Hubei are robust, and the selected model is suitable for this research.

Estimated Production Efficiencies.
Next, the authors further analyzed the industrial competitiveness within Hubei. Based on the selected SFA model, the annual mean production efficiencies of industrial enterprises in the 17 prefectures of Hubei 1999-2011 were derived on Stata ( Table 6).
As shown in Table 6, the 17 prefectures differed sharply in estimated production efficiency from 1999 to 2011. For comparison, the 17 prefectures were divided into three groups by the production efficiency of manufacturing companies: low efficiency group, medium efficiency group, and high efficiency group. Due to the lack of space, the three groups were compared only in 1999 and 2011.
As shown in Figure 1, Hubei Province had a generally low production efficiency of manufacturing companies. About 2/3 of all prefectures belonged to the medium efficiency group. e production efficiency of manufacturing companies in Hubei had not been significantly improved in the sample period. From 1999 to 2011, the industrial production efficiency in most prefectures did not change significantly, and only 4 prefectures witnessed changes in that efficiency. Specifically, Xianning dropped from medium efficiency group to low efficiency group; Wuhan fell from high efficiency group to medium efficiency group; Xiangfan promoted from low efficiency group to medium efficiency group; Xiaogan climbed up from medium efficiency group to high efficiency group. All the other prefectures remained in the original group.

Conclusions
To reveal the impact of production efficiency improvement on manufacturing competitiveness, this paper carries out SFA to estimate the production efficiency of manufacturing in Hubei Province, based on the data of Chinese industrial enterprises from 1999 to 2011. e main conclusions are as follows: (1) Mean balance of net fixed assets and fixed assets (e.g., infrastructure) both had positive impact on the gross industrial output of manufacturing companies. is means the added value of manufacturing companies in Hubei depends much on the long-term investment and fixed asset investment of enterprises. erefore, the enterprises should actively increase the share of fixed asset investment and long-term investment in corporate assets and pay particular attention to the cultivation of technological innovation capabilities. Meanwhile, the enterprises should digest, absorb, and reinnovate the introduced technologies and equipment, manufacture highly technical products, and enhance their own competitiveness.
(2) Labor and human capital had relatively great impact on the gross output of manufacturing companies and determined the industrial added value of enterprises in the long term. erefore, Hubei Province should attach importance to human resources and strengthen the integration of production, education, and research. It is also important to encourage the interaction between enterprises, colleges, and research institutions. e province should give play to  Discrete Dynamics in Nature and Society its advantages in science and education and establish a long-term cooperation platform between enterprises, colleges, and research institutions. (3) From 1999 to 2011, the industrial production efficiency in most prefectures did not change significantly, and only 4 prefectures witnessed changes in that efficiency. Specifically, Xianning dropped from medium efficiency group to low efficiency group; Wuhan fell from high efficiency group to medium efficiency group; Xiangfan promoted from low efficiency group to medium efficiency group; Xiaogan climbed up from medium efficiency group to high efficiency group.
e above changes in production efficiency mainly arise from geographic relations, especially the development of Wuhan Metropolitan Area. For example, Xiaogan has certain advantages in space and transportation and mainly develops light industries like the production and processing of grain, cotton, oil, animal husbandry, and aquatic products. Xianning focuses its energy to build a production and processing base for green agriculture, forestry, and aquatic products, as well as characteristic agricultural and sideline products. Wuhan functions as an advanced manufacturing base and a research and industrialization base of high-tech industries. Nevertheless, the Wuhan Metropolitan Area has not grown fast enough, and the relevant cities lack clear division of labor and cooperation.
To solve the above structural problems, Hubei Province should make full use of its geographical advantage as "a thoroughfare leading to nine provinces" and strive to build a modern industrial system that appeals to foreign investors. With Wuhan playing the leading role in regional coordinated development, the province needs to speed up the formation of a regional economic structure for mutual promotion and development. Under the structure, Wuhan serves as the center, six other large cities serve as the pillar, and the counties serve as the basis. In addition, Hubei must further improve the industrial chain within clusters, promote the integration of regional manufacturing, and thereby enhance its manufacturing competitiveness.

Data Availability
e data used to support the findings of this study are available from the corresponding author upon request.

Conflicts of Interest
e authors declare that they have no conflicts of interest.