Linking development of skills and perceptions of employability: the case of Erasmus students

Abstract There is evidence that perceptions of employability lead to positive results for organizations and individuals alike. The relationship between perceptions of employability and development of skills is, although relevant, an understudied area of research. This study analyses this relationship in a sample of 196 students who participated in the Erasmus program between 2013 and 2017. Using fuzzy set qualitative comparative analysis (fsQCA), we analyse how configurations of five types of skills (Career-orientation skills, Adaptability skills, Managerial skills, Personal skills and Teamwork skills) combine to produce perceptions of employability. Results show that, although Erasmus students perceive a positive development in all groups of skills, students perceive a higher development on Adaptability skills. Results also show that there is no single type of skills that can be developed to promote perceptions of employability but, instead, there are two distinct configurational groupings of skills that lead to perceptions of employability: one configuration has two core conditions—Adaptability skills and Teamwork skills—and the other configuration includes three core conditions—Career-orientation skills, Managerial skills and Personal skills. These configurations match the two main motivations for choosing an international exchange as a strategy to enhance employability: pursuing an international career and pursuing distinction from peers.


Introduction
The enhancement of employability has long been a concern for policy-makers, HRM practitioners, and academic researchers (De Cuyper, Van der Heijden, & De Witte, 2011;McQuaid & Lindsay, 2005;Silla, De Cuyper, Gracia, Peir o, & De Witte, 2009). Employability has been studied from a variety of perspectives, including macro, meso, and micro levels of analysis (Berntson & Marklund, 2007;Forrier & Sels, 2003;Vanhercke, De Cuyper, Peeters, & De Witte, 2014). Our focus is on the micro level of analysis, more specifically on perceptions of employability, that is, the perceptions individuals have of their chances of obtaining or maintaining a position in the labour market. These perceptions are of particular importance, since individuals' choices of behaviour are more based on their perceptions than on objective reality (Roskies & Louis-Guerin, 1990;Silla et al., 2009;Vanhercke et al., 2014). Furthermore, there is evidence that perceptions of employability lead to positive results for organizations and individuals alike. These positive results include performance (e.g., De Cuyper et al., 2011;, career success (De Vos, De Hauw, & Van der Heijden, 2011), as well as well-being and life satisfaction (e.g., Berntson & Marklund, 2007;Silla et al., 2009).
Given the importance of perceptions of employability for both organizational performance and individual satisfaction, the identification of factors that foster these perceptions becomes a relevant research question. However, there are few studies on why individuals perceive themselves as highly or less employable (Jackson & Wilton, 2017;Vanhercke et al., 2014). In particular, the relationship between perceptions of employability and development of skills, although relevant, is an understudied area of research (Akkermans, Tims, Beijer, & De Cuyper, 2019, De Vos et al., 2011Vanhercke et al., 2014). On the other hand, studies on skills development and studies on perceptions of employability have both been mainly undertaken from the perspective of people who are already employed. In the current state-of-the-art, Vanhercke et al. (2014) argue that there is a potential for research and the development of measurement tailored towards the context of other groups, such as students and the unemployed.
The current study intends fill the above-identified research gaps by analysing the relationship between development of skills and perceptions of employability. For this, we will focus on the case of university students participating in the Erasmus program, which we believe is a rich field of research for our topic.
The Erasmus program is a student exchange program founded by the European Commission in 1987. It allows students to study abroad for up to 12 months per cycle of higher education and is probably the most famous European program. Over the first ten years, the number of participating students rapidly grew from 3,000 in 1987/ 88 to 86,000 in 1997/98. Thirty years later, in the academic year of 2017/18, over 300,000 students were involved in international exchanges, for an annual budget of 2.6 billion Euros (European Commission, 2019).
There is widespread agreement that international mobility, such as that of the Erasmus program, results in several benefits for students, mainly regarding their personal development and their employability (Souto-Otero, Huisman, Beerkens, de Wit, & SunÁica, 2013). Several authors have, however, also pointed out that there is little empirical work on the link between student mobility, personal development and employability (e.g., Crossman & Clarke, 2010;Huang, 2013;Mattern, 2016;Van Mol, 2017;Wiers-Jenssen, 2008). While it is indisputable that international exchanges are very rewarding from a personal perspective, there is currently not sufficient evidence of the benefits for individual career-related outcomes (Stronkhorst, 2005;Wiers-Jenssen, 2008).
We want to know which skills may be developed in an Erasmus exchange that may affect students' perception of employability. The current research has three main objectives. First of all, to the best of our knowledge there is no empirical measure of perceptions of employability that is specifically tailored for the case of Erasmus students. Based on a review of the literature, we will take a few steps towards the development of such a measure. Secondly, previous studies on the development of skills by Erasmus students have used different lists of skills, which makes it difficult to build on previous results. Again, we will turn to literature review to attempt to identify a comprehensive list of skills that have been related to the Erasmus experience. Afterwards, we will attempt to devise an empirically driven typology of skills that may be used in future research. Thirdly, bearing in mind that previous research does not present a clear path linking a certain type of skills to employability we will use fuzzy set qualitative comparative analysis (fsQCA) to analyse how different skills may combine to produce perceptions of employability.

Employability and perceptions of employability
Research on employability has attracted the interest of policy-makers, HRM practitioners, as well as academics McQuaid & Lindsay, 2005;Silla et al., 2009). This research field started to grow in the 1990s but concerns with employability started much earlier. Already in 1950s, there were explicit references to approaches on employability. These early approaches were conceived at the macrolevel, with policy makers attempting to devise interventions to solve the need for manpower in the post-war period (Forrier & Sels, 2003;Vanhercke et al., 2014). These macro-level approaches still subsist in current governmental policies concerning the attempt to reach full national employment (Berntson & Marklund, 2007).
In the 1980s, employability concerns were related to increasing organizational flexibility in order to enhance fast adaptation to changes in the dynamic global environment. Organizations needed to constantly match labour demand and supply, and the main concern was having the right number of people with the necessary skills. The focus then shifted to the meso-level, i.e. the organizational level, with organizations attempting to devise policies to achieve numerical and functional flexibility (Berntson & Marklund, 2007;Forrier & Sels, 2003;Van der Heijde & Van der Heijden, 2006;Vanhercke et al., 2014).
Since the 1990s, the focus shifted to the micro-level, i.e. the individual. Current approaches generally equate employability with an individual's possibility to find and/ or maintain a position in the internal or external labour market (Forrier & Sels, 2003;Vanhercke et al., 2014). This shift to the individual as the main actor is related to major changes in the psychological contract, that is, employees' beliefs about the mutual obligations between their employers and them (Rousseau & Tijoriwala, 1998). Over the last two decades, organizational changes lead to the erosion of the traditional psychological contract, where employers provided job security and career management, and employees reciprocated with loyalty (Rothwell & Arnold, 2007;Silla et al., 2009;Zhao, Wayne, Glibkowski, & Bravo, 2007). Employees nowadays no longer expect lifelong employment in the same company and know that they need to manage their careers themselves (Pate, Martin, & Staines, 2000;Philippaers, De Cuyper, Forrier, Elst, & De Witte, 2016;Rothwell & Arnold, 2007;Zhao et al., 2007). They do, however, expect their employers to provide them with opportunities for improving their employability in the labour market, such as training and development, feedback, and other support activities (Forrier & Sels, 2003;Rothwell & Arnold, 2007;Soares & Mosquera, 2019).
The current study focuses on the individual-level approach, follows the outcomeoriented conceptualization of employability, and analyses subjective employability measures, such as perception of employability. Perception of employability is defined as an individual's perception of his/her chances of obtaining or maintaining employment in the internal and external labour market (Akkermans et al., 2019;Berntson & Marklund, 2007;Philippaers et al., 2016;Vanhercke et al., 2014).
Perceptions of employability reflect both personal factors, such as education, but also context factors, such as economic conditions and their consequences for the labour market (Akkermans et al., 2019;Silla et al., 2009;Vanhercke et al., 2014). That is, an individual's subjective assessment of his/her chance to obtain an employment is based on a personal assessment, but also on the assessment of the specific labour market context in which he/she seeks employment. Since perceptions of employability develop from the interaction between context factors (the labour market situation) and personal factors (ability to meet the requirements or challenges of that context), those subjective assessments capture the main aspects that are relevant for the employability debate Trevor, 2001).
Perceptions of employability are particularly relevant because individuals tend to act more upon their perceptions than upon objective reality. Objective indicators (either at the national, organizational or individual level) may enhance employability but, if people do not see themselves as employable, they may overlook those objective indicators and their feelings and actions will be congruent with that perception Roskies & Louis-Guerin, 1990;Silla et al., 2009;Vanhercke et al., 2014). By contrast, even in turbulent, insecure and competitive environments, individuals perceiving themselves as possessing high employability will be more likely to identify alternative job opportunities available to them (Fugate et al., 2004), which in turn fosters feelings of security and self-assurance (Berntson & Marklund, 2007;Jackson & Wilton, 2017).
Research has shown that perceptions of employability lead to positive consequences for both individuals and organization. Studies have found a positive association between perceptions of employability and organizational commitment (e.g., Given the importance of perceptions of employability for both organizational performance and individual satisfaction, the identification of factors that foster these perceptions becomes a relevant research question. The current study focuses on the role played by the development of skills on perceptions of employability. Based on previous research (e.g., Akkermans et al., 2019;De Vos et al., 2011;Forrier & Sels, 2003;Vanhercke et al., 2014), we hypothesize that: H1: Development of skills contributes to produce perceptions of employability.
Previous research does not present a clear path linking a certain type of skills to employability, that is, how different skills may combine to produce perceptions of employability. The current study aims to be a contribution to this issue, by using fuzzy set qualitative comparative analysis (fsQCA).
In their analysis of the current state-of-the-art regarding perceived employability, Vanhercke et al. (2014) note that studies have been almost exclusively undertaken from the perspective of people who are already employed, and argue that there is a potential for research and the development of measurement tailored towards the context of other groups, such as students and the unemployed. The current study will focus on the case of students in higher education, particularly those who have participated in the Erasmus program.
The employability of graduates is currently an important concern for higher education institutions. Over the last decades, it has become common practice for those institutions to publicize in their prospectuses and on their internet sites the employability rates of the courses and degrees they offer. These rates are usually operationalized as the percentage of students that have secured a job before graduation, or in some specific period after graduation (for example, one month, six months or one year). Besides signalling the quality of the institution to potential candidates, these indicators are sometimes used as evaluative indicators when considering the funding of higher education institutions (Jongbloed & Vossensteyn, 2001;Lindberg, 2007;Tymon, 2013).
Approaches to graduate employability also include the input-output distinction which we described previously. Most definitions of graduate employability are inputoriented, in the sense that they include the possession of skills as a requirement (Jacobone & Moro, 2015;Mason, Williams, & Cranmer, 2009;Mattern, 2016;Tymon, 2013). Much research has been devoted to the identification of employability skills for graduates and several frameworks have been proposed, usually consisting of lists of skills of varying length. Tymon (2013) reviewed six different frameworks from different sources (employers, graduates, and universities in different countries) and found that communication/interpersonal skills and teamwork appear in all of them. A more recent study from Rima, Syeda, and Lubna (2016) corroborates the relevance of soft skills, such as teamwork and communication skills, in the current labour market. The more global the market is, the more diverse the workforce becomes, and the more organizations need employees who are capable of interacting with different cultures (Dean & East, 2019). In fact, many executive leaders emphasize the relevance of the development of soft skills because of their role in productive performance (Robles, 2012).
There are, however, considerable differences between different stakeholder groups and even within the same stakeholder group. Besides, investment in a particular set of skills does not necessarily lead to better employability prospects. Mason et al. (2009) conducted research that used a list of seven skills identified through a national enquiry in the UK-Communication, numeracy, literacy, information technology, problem-solving, understanding the world of work, and team working. Findings from his study reveal that a measure of involvement in these skills is not significantly related to labour market performance. Tomlinson (2007) follows an output-oriented approach and argues that it is important to analyse how students understand and how they attempt to manage their employability. The author further notes that research on students' employability has continually neglected its subjective dimension. As mentioned earlier, the current study intends to fulfil this research gap by analysing perceptions of employability of university students.

Perceptions of employability of Erasmus students
For the purpose of this study, we attempted to develop a measure that analyses perceptions of employability for the specific case of Erasmus students. The purpose is to measure the extent to which students perceive that participating in an Erasmus exchange enhances their employability.
The development of this measure was based on the literature review, through which four main topics for the development of items were identified-achieving distinction from national peers, meeting the requirements of national employers, enhancing the possibility of an international career, and developing career-oriented skills.
The literature on international student exchanges and employability shows that the pursuit of distinction from national peers is an important motivation underlying the choice of an international exchange as a strategy to enhance employability. Several authors have noted that, given the current congestion of the graduate labour market, students are increasingly searching for ways in which to distinguish themselves from their peers (e.g., Brooks, Waters, & Pimlott-Wilson, 2012;Brown & Hesketh, 2004;Tomlinson, 2007;Tymon, 2013).
The pursuit of distinction from national peers only leads to higher employability provided that national employers value qualifications obtained abroad and/or the development of skills resulting from the exchange experience. Therefore, meeting the requirements of national employers is another important issue related to perceptions of employability. Several studies have provided evidence on the importance employers attribute to studying abroad. The Erasmus Impact Study (European Commission, 2014) shows that the share of employers who considered experience abroad to be important for employability nearly doubled between 2006 and 2013, from 37% to 64%. By contrast, Van Mol (2017) conducted a survey with more than 7,000 employers in Europe and found that international experience was only relevant as hiring criteria for a minority of employers. The value of international experience for employers appears to be dependent upon the relevance of that experience for the activities of the company, that is, whether the company has links with the country where the exchange occurred (Crossman & Clarke, 2010). For example, Opper, Teichler, and Carlson (1990) found that the majority of exchange students were employed in firms or organizations with contacts with the country of their study abroad.
Another motivation to study abroad is anchored in the belief that participation in the exchange program enhances the chances of having an international career or obtaining employment abroad. An international exchange may be perceived as leading to the development of skills deemed relevant in international assignments, such as language proficiency and the ability to operate in culturally diverse contexts (Wiers-Jenssen, 2008). Several studies on early careers of graduates have provided evidence on the link between student mobility and international mobility. Findings from the studies of Jahr and Teichler (2002) and Wiers-Jenssen (2008) show that, when compared to nonmobile students, mobile students more often search for and gain work experience abroad. In the domestic market, mobile students hold jobs with more international assignments. Parey and Waldinger (2011) found that participating in an Erasmus exchange increases an individual's probability of working in a foreign country by about 15 to 20 percentage points. In Bryla's (2015a) sample of former Erasmus students from Poland, 68.6% had worked abroad in the first 5-6 years after their return from the exchange program. Bryla (2015a) also found that, when enquired about their current positions, 1/3 of respondents considered that their international experience had a very important influence on obtaining it, and almost 1/5 specified Erasmus mobility as a key factor.
Results from the 2007 Erasmus Student Network Survey (Krzaklewska & Krupnik, 2007) provide evidence on other issues underlying perceptions of employability of Erasmus students. The authors make a distinction between two groups of students: Career-oriented students, focusing on improving academic knowledge, enhancing future employment prospects and the practice of a foreign language, and Experienceoriented students, focusing on learning about new cultures, having new experiences and being independent. The first group of students are clearly more concerned with their employability. The characteristics of this group allow for the identification of developing career-oriented skills as another relevant topic for our measure of perceptions of employability. Table 1 summarizes the four topics identified and the items formulated.

Development of skills related to the Erasmus experience
Several studies have been undertaken with the aim of identifying skills developed by students during the Erasmus program. The Erasmus Impact Study (European Commission, 2014) is a major reference on this topic. This study analyses six factors, namely Tolerance of Ambiguity (acceptance of other people's culture and attitudes and adaptability), Curiosity (openness to new experiences), Confidence (trust in own competence), Serenity (awareness of own strengths and weaknesses), Decisiveness (ability to make decisions) and Vigour (ability to solve problems). The relevance of these factors was confirmed by questioning a pool of 635 employers across 34 countries. To analyse the development of skills, the study used both objective measures (comparing skill levels before and after Erasmus) and subjective measures (students' perceptions on their development of skills). Results show that 52% of Erasmus students increased their skills and 81% of students felt they had experienced an improvement in their skills. Moreover, when compared with nonmobile students, although Erasmus students showed higher values for all factors even before departure, they increased they advantage by 42% upon return. Erasmus students had particularly high results on the Confidence factor.
Besides the Erasmus Impact Study, a few other studies have also focused on the skills developed by Erasmus participants (e.g., Bryla, 2015b Languages, cultural and social awareness are some of the more frequently referred employability skills enhanced by the Erasmus program (Mattern, 2016). During an international mobility exchange, students face intercultural challenges when interacting with people from different cultures providing the opportunity to enhance their intercultural skills (Matei, 2019). Besides, it has also been suggested that the mobility programme increases students' cosmopolitan orientation, European consciousness and identity (Jacobone & Moro, 2015) and it could also be an excellent way for students to learn more about host countries social and economic reality (Cairns, 2017). Vaicekauskas et al. (2013) used a framework of eight skills, based on the 2006 recommendation of the European Parliament and of the Council regarding the key skills for lifelong learning. This framework included Communication in mother tongue, Communication in foreign languages, Mathematical skills and basic skills in science and technology, Digital skills, Learning to learn, Social and civic skills, Sense of initiative and entrepreneurship, and Cultural awareness and expression. Results show that students considered they have developed all these skills, in particular the ones related to Communication, Social and civic skills, Learning to learn, and Cultural awareness and expression. Bryla (2015b) conducted a survey on the benefits of an Erasmus exchange as perceived by former Polish students and found that respondents emphasized improving foreign language skills, making international friends, enhancing their intercultural understanding, becoming more mobile, more independent, and more self-confident. Similarly, with a sample of Romanian former Erasmus students, Dolga et al. (2015) found that respondents perceived important impacts of the exchange for their development of relational skills, self-confidence, and independence.
The study of Mart ınez-Usarralde et al. (2017) is probably the one that identifies the largest set of skills associated with the Erasmus experience. This study was conducted in Spain and analysed how different agents involved in the Erasmus exchange (organizations, universities and Erasmus students) perceive the benefits of Erasmus as far as the acquisition of skills is concerned. Mart ınez-Usarralde et al. (2017)

Method
Since one of the objectives of our study is to analyse different configurational groupings of skills' development in order to enhance employability, we decided to use fuzzy set qualitative comparative analysis (fsQCA). For this type of analysis, fsQCA presents many advantages, such as equifinality, multifinality, conjunctival causation and asymmetric causality (Fiss, 2011;Ragin, 2008). Additionally, it can also be used for medium and large samples (Greckhamer, Misangyi, & Fiss, 2013;Kraus, Mensching, Calabr o, Cheng, & Filser, 2016;Wu, Yeh, Huan, & Woodside, 2014) as is the case of our sample.

Data collection
Through contacts with the Erasmus Students Network in Lisbon and the International Mobility Office of Universidade de Lisboa, e-mails were sent to students who had an Erasmus experience between 2013 and 2017. The e-mail provided an internet link to the questionnaire, and asked recipients to forward it to their friends who also had an Erasmus experience. Between July and November 2017, a convenience sample of 196 of students was obtained. Within the total sample 67.2% of participants are female and their ages range from 21 to 32 years old. As far as study areas are concerned, 65.5% studied Social Sciences, 16.5% Applied Sciences, 12.9% Humanities, 3.6% Natural Sciences and 1.5% Arts. Most participants (87.8%) fulfilled all the academic objectives set for their Erasmus Exchange and about half of them (51%) were already employed when they answered the questionnaire.

Measures
The instrument used in this study had four main groups. The first group concerned the measure of perceptions of employability, which was developed for the purpose of the current study. This scale had 6 items, previously described. For each item, a 7point scale is used, where 1 ¼ strongly disagree and 7 ¼ strongly agree. The second and third group concerned the development of skills, and we used 33 skills identified by Mart ınez-Usarralde et al. (2017). Participants were asked to rate themselves in those skills using a 7-point scale where 1 ¼ extremely poor and 7 ¼ excellent. In the second group, the rating referred to 'before Erasmus' and in the third group to 'after Erasmus'. The fourth group included demographic data on participants.
Subsequently, a measure of development for each skill was computed by subtracting the rating 'before Erasmus' to the rating 'after Erasmus', and we conducted exploratory factor analyses with this result for the 33 skills. Table 2 presents the results of the factor analysis that enabled us to group the skills into 5 factors labelled as 'Career-orientation skills', 'Adaptability skills', 'Managerial skills', 'Personal skills', and 'Teamwork skills'. Principal components analysis was the extraction method and varimax the rotation method. The five factors explain 56,70% of variance and the Kaiser-Meyer-Olkin test was 0,898, showing no problems of sampling adequacy. Since the Cronbach's alpha of the factors range from 0.718 to 0.895, all factors present acceptable or good reliability (Nunnally & Bernstein, 1994).

Outcome
The outcome of this study is perceptions of employability. The final Perceptions of Employability scoring is the mean of all the items of the scale presented in Table 1. Table 3 shows the means and standard deviations of the items. The Cronbach's alpha coefficient of the scale is 0.867, which means that the measure is within acceptable thresholds of reliability (Nunnally & Bernstein, 1994). We repeated factor analysis with the 33 items of Development of Skills and the 6 items of Perceptions of Employability. Six factors were extracted, explaining 57,99% of variance, and with a Kaiser-Meyer-Olkin of 0,917, indicating that there were no problems of sampling adequacy. All items of the perceptions of employability scale loaded together in an independent factor, which is an indication of validity (Nunnally & Bernstein, 1994).

Conditions
The present study uses six conditions: five perception of skills development and gender. Gender is a dummy variable that equals one for men and zero for women.

Calibration
The present study uses three different anchors to calibrate the data, as proposed by Woodside and Zhang (2013). According to this author, the anchor points are set to 95% to specify full membership, 50% for the crossover and 5% for the full nonmembership. Table 4 presents the calibration values and the descriptive statistics for the conditions and outcome.

Analysis of necessary conditions
Following Schneider and Wagemann (2010), we start fsQCA analysis by identifying whether any of the causal conditions are necessary to the outcome (employability) or its absence. According to Ragin (2000), a condition is 'necessary' or 'almost always necessary' if the consistency score exceeds the threshold of 0.9 or 0.8, respectively. Table 5 presents the results of the analysis of the necessity of conditions. According to the table, none of the conditions exceeds the proposed thresholds. Thus, there are no 'necessary' or almost 'necessary conditions'.

Analysis of sufficient conditions
A condition is sufficient if the outcome always occurs in its presence, regardless the presence of other conditions (Ragin, 2000;. The sufficiency analysis was conducted with a truth table based on two criteria: frequency and consistency (Ragin, 2008). For large samples (n > 50), Greckhamer et al. (2013) recommend a frequency threshold of 3 or more best-fit cases and a consistency threshold of 0.80 at least. In our study, we set the frequency threshold at four and the consistency threshold at 0.869. Table 6 shows the results of the fuzzy set analysis for employability, using the notation adopted by Ragin and Fiss (2008). According to the authors, black circles () denote the presence of a condition and circles with a cross-out () denote its absence. Moreover, a large circle refers to a core condition and a small one to a peripherical condition.
According to Table 6, there are two distinct configurational groupings with both core and peripherical conditions. Both solutions exhibit acceptable consistency (> ¼ 0.80). The first configuration suggests the presence of first order equifinality, presenting two solutions (1a and 1b) that rely on a combination of Adaptability skills and  Teamwork skills. Both solutions also indicate the presence of second-order equifinality, showing a clear trade-off between Career skills (solution 1a) and a combination of Managerial skills and Personal skills for women (solution 1b). The second configuration suggests the presence of three core conditions-Career-orientation skills, Managerial skills and Personal skills-in two solutions that reveal a trade-off between Adaptability skills for women (solution 2a) and Teamwork skills, also for women (solution 2b).

Discussion and conclusion
The first objective of this study was to develop a measure of Perceptions of Employability specifically tailored to be used with Erasmus students. Although further tests are necessary, we obtained some evidence of reliability and validity that leads us to believe that this is a promising measure for further studies. Results of this measure show that students clearly perceive that the exchange has a positive effect on their employability (Table 2). Although several authors have argued that Erasmus exchanges enhance the employability of students (Bryla, 2015a;Dolga et al., 2015;Mart ınez-Usarralde et al., 2017;Parey & Waldinger, 2011), to the best of our knowledge no previous study has measured employability from the perspective of Erasmus students.
The second objective of the study was to identify in the literature a comprehensive set of skills that are developed by Erasmus students, and then attempt to devise an empirically driven typology of skills that may be used in future research. We used 33 skills from the framework of Mart ınez-Usarralde et al. (2017) and through factor analysis we identified five groups of skills-Career-orientation skills, Adaptability skills, Managerial skills, Personal skills and Teamwork skills. Results on these scales show that Erasmus students perceive a positive development in all the groups of skills used in this study. We computed a measure that subtracts ratings 'before Erasmus' to ratings 'after Erasmus' and, for all the groups of skills, the means are positive (Table 4), meaning that the 'after Erasmus' rating is on average higher than the 'before Erasmus' rating. This result is in line with previous studies on Erasmus studies who also found positive results as far as the development of skills is concerned (e.g., Bryla, 2015b;Dolga et al., 2015;Mart ınez-Usarralde et al., 2017;Vaicekauskas et al., 2013). Adaptability skills is the group where students perceive a higher development of skills. This group includes the development of skills related to operating in new and culturally diverse countries, which has often been put forward as a benefit of international student exchanges (Wiers-Jenssen, 2008).
While previous research on Erasmus exchanges has widely recognized the benefits for skills development and employability, there is still a lack of research on the link between skills development and the enhancement of employability. The third objective of this study was to attempt to fill this gap by conducting a fuzzy set analysis with five types of skills that may be developed by studying abroad as sufficient conditions and students' perceptions of employability as the outcome.
Resulting configurations of the fsQCA give a clearer understanding that there is no single type of skills that can be developed to promote employability, that is, there are no 'necessary' or 'almost necessary' conditions. Although Mason et al. (2009) has already pointed out that the investment in a specific set of skills does not necessarily lead to better employability prospects, this is, to the best of our knowledge, the first study to give an understanding of how skills combine to produce employability.
We found two distinct configurational groupings to produce employability: one configuration has two core conditions: Adaptability skills and Teamwork skills. The other configuration includes three core conditions: Career-orientation skills, Managerial skills and Personal skills. The two distinct configurations appear to match the two main motivations for the choice of an international exchange as a strategy to enhance employability: Pursuing an international career (e.g., Wiers-Jenssen, 2008) and pursuing distinction from peers (e.g., Brooks et al., 2012). The motivation to pursue an international career may result in a focus on the development of adaptability skills, related to operating in different countries and different cultural contexts, and teamwork skills, related to tolerance, respect, and adaptation to people of different backgrounds. On the other hand, a motivation for distinction from peers may result in a focus on the development of skills that are usually associated with career advancement, such as career-orientation, managerial skills and personal skills.
Given that students enter the exchange with different motivations and that these motivations are associated with different foci towards the development of skills, some managerial implications may be drawn for higher education institutions (HEI). For attracting international students and assuring that their expectations are fulfilled, HEI need to clearly analyse their strengths and weaknesses as far as the development of particular skills are concerned, to implement relevant programs, and to clearly communicate these programs and their results.
Results also evidence gender differences in the combinations of skills development that are perceived to contribute to students' employability. Data shows that there are more possible combinations of skills development to produce employability for women (solutions 1b, 2a, 2b). Nevertheless, we did not find in the literature review other studies evidencing these differences. Therefore, we suggest that future studies should consider including gender to validate these results. We also suggest that future research further explores whether variables in the students' background, such as nationality or area of studies, have an impact on the configurations of skills to produce employability.
The sample size is a limitation of this study, since it is relatively small for a research on students. Also, it did not allow us to undertake an analysis by nationality of participants or by country of destination in the Erasmus program. For the development of skills, it would also be interesting to have an objective measure of skills improvement, which could then be compared with self/rating.
For future research, we consider it worthwhile to replicate this study with a wider sample. The use of constructs related to Perceptions of Employability would also be relevant to allow for further validity tests. Another suggestion would be to l replicate the present study with students who did not participate in international exchanges. That would allow for a better understanding on whether or not the configurations of skills found in this study are specific to students participating in Erasmus programs. Finally, we suggest that future research on the topic of Perceptions of Employability of Erasmus students includes an analysis of its consequences, such as increased job search, more confident presentation in selection processes, and positive job outcomes.