Re‑thinking the drivers of regular and irregular migration: evidence from the MENA region

topic Abstract Why do individuals vary in their desire to emigrate? Why are some willing to emigrate irregularly? This article tests four theoretical approaches—socio-demographics; economic and political context; access to migrant networks; and psychological factors— across the Middle East and North Africa region. Data from the Arab Barometer is used to show that the most prevalent factors are youth, university education, being male, and stress levels as well as negative economic and political perceptions, being unmarried, trust in social media, remittances, and low religiosity. Notably, economic factors such as unemployment and income are shown to rarely have an effect. The determinants of being willing to emigrate without papers are fewer and distinct: gender and lower income especially as well as lower education and negative economic and political perceptions. Several contributions to our understanding of emigration are made: a two-step model of irregular emigration based on findings across 12 countries, new evidence of the complex and, within-country, muted role of economic factors, the centrality of psychology, and how, tentatively, it appears that both extreme wealth and war interact with the most fundamental socio-demographic drivers.

what levels of propensity to emigrate are, why individuals vary in this propensity and what interventions are likely to affect it-negatively or positively-is of overwhelming practical importance for advocacy organisations, governments, communicators, policymakers and those working in politics who either want to know what is likely to be a sustainable migration policy framework or how to communicate on migration.
As such, this article asks why do individuals vary in their desire to emigrate? And why are some willing to emigrate irregularly? It tests four sets of theoretical answers to these questions across 12 countries in the Middle East and North Africa (MENA) region, finding some evidence to support certain variables in each of the four sets for both types of emigration. To do so, it uses logistic regression analyses, as well as descriptive data, based on data from the Arab Barometer, which has conducted international standard social scientific surveys across the Middle East and North Africa every two years since 2006 with sample sizes of around 2400 per country based on area probability sampling and face-to-face interviews. Uniquely, the penultimate, 2018/2019 round of surveys asked not only about desire to migrate but also about willingness to do so irregularly, as well as a range of socio-demographic, attitudinal and behavioural indicators.
In doing so it makes five contributions. First, it conceives of and tests (irregular) migration as a two-step process-first, wanting to emigrate in general and, second, being willing to do so irregularly-and so disentangles the determinants of each. Second, by covering 12 countries the study highlights commonalities across country contexts and provides a generalisable model of the two-step process, shown in Fig. 6. Third, it shows that objective economic indicators like income and employment status have weak predictive power when other socio-demographics, political and economic perceptions, access to migrant networks, and psychological variables are controlled for, contradicting with stated reasons for thinking of emigrating as shown below. In the discussion, potential reasons for this seeming contradiction are offered. Fourth, the predictive power of psychological variables is highlighted, with feeling stressed a particularly prevalent predictor of thinking of emigrating and interpersonal trust in some countries shown to predict willingness to do so without papers. Fifth, by taking a cross-country approach, several countries are shown to have typical determinants of emigration, and a few are shown to be atypical in the effects of socio-demographics-Iraq, Kuwait, Libya, Sudan, and Yemen-highlighting the seeming ability of extreme wealth (in Kuwait) and war to interact with and even reverse the most fundamental determinants of migration, a relationship that should be further investigated.
The article proceeds as follows. In the next section, the key theoretical approaches to explaining migration are outlined, with additional attention placed upon recent psychological findings. Next, the data and methods that the study uses are outlined. After this, three sets of descriptive variables are displayed: propensity to emigrate across the MENA region over time, distribution of desire to emigrate and irregularity willingness by country, and stated reasons for wanting to emigrate by both country and irregularity willingness. Next, regression analyses are performed for each country, first, to explain thinking of emigrating and, second, for being willing to do so without papers, before a general model of the two-step process is presented. Finally, the findings are discussed.
Other findings based on host country context include: the quality of the democratic system, the government's capacity to provide services (including education, social security, pensions and ability to impose law; e.g., Dustmann & Okatenko, 2014;Van Dalen & Henkens, 2007), perceptions of neighbourhood safety, perceptions of corruption, evaluations of government effectiveness, being a victim of crime, satisfaction with democracy (e.g. Begović et al., 2020). This leads Hiskey et al. (2014) to summarise that 'the emigration decision of certain individuals in authoritarian regimes is without a doubt in large part a function of the political system and one's assessment of their future within that system. ' Most pronounced of all is the effect of war on propensity to emigrate regardless of development levels (Cohen, 1987).
Overall, the above findings lead Black et al., (2011: S5) to produce a theoretical model of the decision to migrate that combines macro contextual factors (politics and economics, but also environmental, social and demographic issues) with the individual's socio-demographic characteristics and 'intervening obstacles and facilitators' . Beyond these, additional "pull factors" that largely mirror the "push" factors but equally explain one's desire to leave one place for another have been identified such as demand for labour in advanced industrial countries (Sirojudin, 2009) and better living conditions; political and/or religious freedom; enjoyment; education; better medical care; and security (Mohamed & Abdul-Talib, 2020).

Psychological forces: an overlooked factor
Psychological indicators have been overlooked in the literature on propensity to emigrate and may be of particular use to practitioners, since, unlike stable socio-demographics or macro-level trends, they can be more easily used to make persuasive or informative communication effective. Moreover, as Hiskey et al. (2014: 93) note 'very little work exists on the cognitive process that precedes the actual act of emigration' . However, psychological determinants of emigration have been shown to include emotions and desires (Carling & Collins, 2017); diverse values and expectations of where those values will be realised (De Jong, 1999), norms (de Jong, 2000, identity (Tharenou, 2010), personality (Frieze & Li, 2010), and willingness to bear the psychic costs of cutting old ties and forging new ones (Massey et al., 1993). Other exceptions that do exist include personal economic and life dissatisfaction-but these only partially result from individual psychological forces and also are rooted in broader context-which have all been repeatedly shown to increase one's chance of emigration (e.g. (Hiskey et al., 2014;Migali & Scipioni, 2018). Most obviously, we can expect one's pattern of thoughts, emotions, social styles and behaviours that affect their self-perceptions, values and attitudes-to affect propensity to migrate, with more open-minded and less aggregable individuals more likely to emigrate and more neurotic and, perhaps, conscientious individuals less likely to do so. Indeed, Boneva and Frieze (2021: 477) show that those who migrate tend to be 'more work-oriented and to have higher achievement and power motivation, but lower affiliation motivation and family centrality' . Berlinschi and Harutyunyan (2019: 831) show that migrants are more optimistic and less risk averse, along with several political psychological findings. Other deep-seated psychological forces that could be tested in future include psychological schema such as personal values, i.e. one's broad motivation goals in life that dictate more specific attitudes and behaviours, should affect propensity to emigrate. For example, in the terms of Schwartz' basic human values (1992) we can expect valuing self-direction, stimulation as well as, potentially, achievement and universalism to increase propensity to emigrate, whereas valuing tradition, conformity and security to reduce propensity to emigrate. A number of other values-schema could also be applied (Dennison et al., 2020).
In addition to these we can expect two further key psychological variables to affect one's propensity to emigrate and whether they would be willing to do so without papers: their sense of self-efficacy and their degree of interpersonal trust. Self-efficacy, the extent to which one feels able to affect their own life via effective behaviours, is likely increase one's chance both of emigrating, generally, and doing so without papers specifically (see Hoppe & Fujishiro, 2015, for review of concept and findings on relationship in Europe). In both cases, the same causal logic is apparent, those with a high sense of selfefficacy will believe that they can both make a success out of the migration processwhich poses its own challenges in both the cases of regular and, even more, irregular migration-and once the act of emigration has taken place. Inter-personal trust is also likely to cause a higher propensity to emigrate, both as a predisposition that leads one to believe that the destination country will be hospitable and to take part in migrant networks based on trust, particularly for those migrating irregularly (see Tilly, 2007, for latter point). Furthermore, two mental health symptoms are also likely to affect both the desire to emigrate and the willingness to do so without papers: experiencing higher stress and depression. Both are likely to lead one to want to emigrate to escape their current situation, however, in the case of the former, we might expect pre-existing stress to reduce one's propensity to emigrate without papers given findings on how irregular emigration causes stress and trauma (Steel et al., 2017).
We now turn to outlining the data and methods we will use to explain why individuals vary in their propensity to emigrate and why some are willing to do so irregularly, based on the findings and theoretical considerations above.

Data and methods
To answer why individuals vary in their propensity to emigrate and why some are willing to do so irregularly, we rely on data from the Arab Barometer. The Arab Barometer has conducted international standard social scientific surveys across the Middle East and North Africa since 2006. The sample design is area probability sampling-making the surveys representative at both national and governorate/regional level-and the mode is face-to-face interviews in the respondent's home, the gold-standard for survey research. Each survey includes around 2400 respondents. More methodological information can be found on the Arab Barometer's website. 1 Its most recent, sixth wave of surveys were administered in late 2021 across seven countries: Algeria, Iraq, Jordan, Lebanon, Libya, Morocco, and Tunisia. Another seven countries have been surveyed at least once over the course of the six waves: Bahrain, Egypt, Kuwait, the Palestinian Territories, Saudi Arabia, Sudan, and Yemen. Not only is the Arab Barometer of high scientific quality, but it has included a question on propensity to migrate in every wave, as well as asking about reasons for wanting to emigrate amongst those who answer positively. More recent waves have also asked about desired migration destination, while the fifth, 2018/2019 wave also asked about willingness to migrate irregularly. As such, the Arab Barometer constitutes an ideal dataset for this study.
Our primary method for testing the various explanations for migrating and doing so irregularly is using logistic regression analysis given the dichotomous nature of the independent variable, both in the case of willingness to emigrate and willingness to do so without papers (see Table 2) below. Theoretically, we conceive (irregular) migration as a two-step process driven by, first, a desire to emigrate and, second, a willingness to do so irregularly. As such, we first produce twelve logistic regression models-one for each country participating in the fifth Arab Barometer-measuring the effect of numerous explanatory variables on our first outcome variable: propensity to emigrate. We then produce another twelve-again, one for each country-measuring the effects of each explanatory variable on willingness to emigrate without papers, amongst those who have expressed a desire to emigrate. We use the fifth round of the Arab Barometer instead of the more recent sixth round because the former includes more countries (at least at the time of writing) and includes a question on willingness to emigrate without papers, which the sixth round does not. Our method allows us to test how each of the theoretical explanations mentioned above affects each of the two outcome variables of

Political and economic context
Economic pessimism "What do you think will be the economic situation in your country during the next few years (2-3 years) compared to the current situation?" 1 "much better" to 5 "much worse" Perceived democracy "Measuring the extent to which your country is democratic, on a scale from 0-10 with 0 meaning there is no democracy whatsoever and 10 meaning that it is democratic to the greatest extent possible. In your opinion, to what extent is your country democratic?" 0 "no democracy" to 10 "complete democracy" Perceived corruption "To what extent do you think that there is corruption within the national state agencies and institutions in your country? " 1 "not at all" to 4 "to a large extent" (original coding reversed) interest. The data in each model is weighted according to the Arab Barometer's weights and missing data is imputed beforehand. The equation for each of the logistic models is as follows:

Access to migration networks
is an individual's probability of responding "yes" as their outcome variable; β 0 is the intercept; β 1 X 1 + β 2 X 2 + · · · + β p X p are the slopes against the independent variables. In addition, equivalent linear regression models are added to the appendices as Tables 6 and 7. The responses to the questions used in our two sets of models are listed below in Table 2. As can be seen, these include our two outcome variables as well as our four sets of explanatory variables, those based on (1) socio-demographics; (2) political and economic context (albeit perceived); (3) access to migration networks; and (4) psychological factors. Each variable is recoded for simplicity and ease of interpretation in the models.

Describing propensity to emigrate in the Arab world
Before moving on to our explanatory models of why individuals vary in their desire to migrate, it is worth overviewing three sets of descriptive statistics from the Arab Barometer. First, the Arab Barometer's six waves allows us to track how propensity to migrate has changed over time. Second, we see how propensity to migrate and willingness to do so without papers is distributed in each country. Third, in seeking to explain why individuals migrate, it is also worth looking at the stated reasons given by those thinking of emigrating but unwilling to do so without papers and those willing to do so without papers.

Propensity to emigrate over time
To measure propensity to migrate by country over time, we use the percentage responding "yes" to "Some people decide to leave their countries to live somewhere else. Have you ever thought about emigrating from your country?". This is by no means the only way to measure propensity to migrate and is likely to result in higher scores than, for example, questions asking about intention or plans to migrate. Indeed, there are numerous inhibiting or facilitating factors that can preclude a desire to emigrate from becoming a reality, as we outlined above. However, its consistent use over time and between countries allows us to capture trends in the sentiment that drives the demand for emigration. In Fig. 1, below, we see results displayed by country over time.
Although country trends vary considerably, four trends are notable. First, Algeria, Jordan, Lebanon, and, to an extent, Morocco have experienced a U-shaped trend in propensity to emigrate over time, starting high in 2007 (between 24 and 50%) and experiencing a decline until 2016. Thereafter, each country experienced a large increase again in propensity to emigrate, which was partial in the case of Algeria and Morocco (by 2021, 30% and 31% respectively) but full in the cases of Jordan and Lebanon (by 2021, 36% and 48% respectively). Notably, the Arab Spring of the early 2010s was relatively less consequential in these countries than in Egypt, Libya, Syria, Bahrain and Tunisia, though there were sustained street demonstrations in them all (for analysis of migration and the Arab Spring see, e.g. Fargues & Fandrich, 2012;Fargues, 2017). Second, Egypt, Iraq, Tunisia, and to an extent Palestine and Libya, have all experienced more-or-less continuously upward trajectories in desire to emigrate throughout the period, from a relatively low score (10%, 21%, 19%, 17% and 11% respectively) to relatively high one (28%, 38%, 47%, 27%, and 14% respectively). Notably, except for Palestine, all of these countries saw the ruler deposed by the Arab Spring. Third, the Gulf states of Bahrain, Kuwait, and Saudi Arabia have been surveyed few times and, in every case, reported relatively low proportions expressing a desire to migrate. Fourth, Sudan and Yemen started with very high proportions of respondents expressing a desire to emigrate, a figure that has stayed constant in the case of the former but declined sharply in the case of the latter.
We now turn to differentiating between the proportion of those who would not considering doing so without official papers (i.e. to emigrate irregularly) and those who would be willing to do so. The Arab Barometer asked in its 2018/2019 wave "Would you consider leaving [COUNTRY]  that officially allowed you to leave?" to those who had already responded that they had thought about emigrating. Below, in Fig. 2, we see the responses by country in ascending order of willingness to emigrate without papers. There are three noteworthy observations. First, amongst those who have thought of migrating, in no country is the proportion willing to do so without papers as high as the proportion unwilling to do so. Second, as a rough rule of thumb across the region, around 30% of citizens have thought of migrating, two-thirds of whom would be unwilling to do so irregularly. Third, the proportion of those willing to migrate without papers varies considerably by country, leaving aside Kuwait, from just 3.1% in Lebanon up to 21.8% in Sudan.
We now turn to describing the reasons people state when asked why they have thought about emigrating. The Arab Barometer presents respondents with the following question: "People want to emigrate for different reasons. Why have you thought about emigrating?". Answers are open-ended and then classified according to eight categories: economic reasons, political, religious, security, education, family reunion, corruption, and other. In Fig. 3, below, we see the answers by country and by willingness to do so without papers.
Overall, the most stated reason for wanting to emigrate was economic reasons. The country-level average was around 60%, both for those willing and unwilling to emigrate without official papers. The second most stated reason was education opportunities amongst both those willing (9.7%) and unwilling (14.6%) to emigrate without official papers. Political and corruption motivations were considerably more prevalent amongst those willing to emigrate without papers (6% and 8.6%) than amongst those unwilling to do so (3.1% and 5.6%). In Egypt, Tunisia, and Jordan both those willing and unwilling to  Fig. 1 for question on desire to emigrate. Those who responded "yes" were then asked "Would you consider leaving [COUNTRY] even if you didn't have the required papers that officially allowed you to leave?". "Total" figure country-level average migrate without papers are overwhelmingly (more than 70% across all six groups) motivated by economic considerations. Algerians have one of the most diverse motivational profiles, with education, family reunification, and corruption highly preeminent. Libyans are highly motivated by security issues, as well as political and, amongst would-be regular migrants, educational issues. Moroccans unwilling to migrate irregularly show a broad motivational profile, including education and family reunification, whereas those willing to do so irregularly are overwhelmingly likely to state the economy. In the "Appendix", we also see the planned countries and regions of destination of both those thinking of emigrating but unwilling to do so without papers and those willing to do so without papers for each of the 12 counties.

Analyses
We now turn to using logistic regression models, as described above, to test why individuals vary in their propensity to emigrate and why some are willing to do so irregularly. In Table 3 we see each country analysis predicting one stating that they have thought of migrating rather than that they have not. In terms of socio-demographic predictors, three explanatory variables stand out for how consistently they have a statistically significant effects: being male (in 9 of the 12 countries), being younger (in all   12 countries), and having a university education (in 11 countries). After this, the most prevalent statistically significant effects were being unmarried (in 6 countries) and the negative effect of being religious (in 6 countries). Of note, the two factors with the least prevalent effects were being unemployed (in 4 countries) and having a higher income (in just 2 countries, positively in Kuwait and negatively as expected in Iraq). Our models also highlight the importance of perceptions of one's economic and political context. In 9 of the 12 countries, pessimism about one's country's economic future was positively associated with thinking of emigrating, while perceiving one's country as democratic had a negative effect in 9 countries and perceiving it as corrupt had a positive effect in 8 countries. Access to migrant networks is also shown to be highly relevant to the likelihood that one is considering emigrating: trusting social media over traditional media is shown to have a positive effect in 9 countries, receiving remittances in 7, and using social media in 5 (with the latter also having a negative effect in Kuwait). Finally, our proposed psychological factors are a mixed bag in terms of their effects: feeling stressed in one's life has a positive statistically significant effect in 10 of the 12 countries-the most prevalent non-socio-demographic predictor, trust has a statistically significant effect in 6 countries but with effects in both directions, whereas both feeling free and feeling depressed have positive effects but in only 2 of the 12 countries. Linear regression tables are shown in the "Appendix" Table 6, with almost identical results.
We now move to testing which of the above variables also affect the probability of being willing to migrate without papers, amongst those who state that they are thinking of migrating in general, shown in Table 4. In terms of socio-demographic predictors, the two most prevalent statistically significant effects are those of being male (9 of 12 countries, with a negative non statistically-significant effect in low-emigration Kuwait) and the negative effect of having an income higher than the country's median (in 8 of countries, with a positive effect in Libya). The next two most prevalent effects are not having a university education (4 countries) and being unmarried (4 countries). Age, unemployment, and religiosity only have statistically significant effects in 1 to 3 countries.
In terms of perceived economic and political context, there is some evidence that economic pessimism has a positive effect (statistically significant in 3 countries, negative in Yemen) on willingness to emigrate without papers and that the perceived level of democracy in one's country has a negative effect (in 3 countries). There is no evidence that perceived corruption has an effect. Similarly, the variables measuring access to migrant networks only show occasional evidence of effects: in 3 countries for social media use (and negative in 1), 2 for social media trust and none for one's family receiving remittances. The psychological factors are similarly not prevalent, with feeling free to make decisions and feeling stressed by life not having statistically significant effects in any country and feeling depressed and trusting other people having effects in only 2 each. Linear regression tables are shown in the "Appendix" Table 7, with almost identical results.
Altogether, these relationships are shown in generalised terms for the MENA region in Fig. 4. Table 4 Logistic regression analyses of propensity to migrate without papers, among those thinking of migrating, by country

Discussion
Why do individuals vary in their desire to emigrate? And why are some willing to emigrate irregularly? Using both descriptive statistics and regression analyses based on Arab Barometer data across the MENA region, several clear conclusions become apparent. The descriptive statistics show that by far the most stated reason is economic motivations. Furthermore, for both groups education opportunities are the second stated reason, though less commonly for would-be irregular migrants, whereas political and corruption motivations were considerably more prevalent amongst those willing to emigrate without papers. In terms of stated reasons, country differences also matter. However, as shown by our regression analyses, stated reasons should not be equated with objective indicators, at least not in economic terms. Whereas many individuals who desire to migrate do so because they want to improve their economic situation, actual income and unemployment status are found to be surprisingly poor predictors of wanting to emigrate across most of the 12 countries we considered. This goes against the overwhelming focus on both indicators within the economics and development literature when seeking to explain emigration. The inconsistency between stated reasons and those observed also presents a puzzle for which there are at least three potential solutions. First, it may be that stating that oneself is Fig. 4 Factors increasing chance of having thought of emigrating and factors increasing willingness to emigrate without papers, across the MENA region motivated by economics reflects ambition (a psychological as well as economic indicator) which is distributed evenly across income and employment levels. Second, it could be that when one says that they are motivated by economics that are referring to their country's economic situation-i.e. in sociotropic terms-rather than their own. Third, it could be that the "inverse U-curve" theory applies within countries as it has been shown to between them, i.e. the very rich and very poor are both less likely to emigrate so that the lack of an observed linear relationship between emigration and income results from a true curvilinear relationship. Interestingly, where income did matter was as a predictor of being willing to emigrate without papers, for which, along with gender, it was one of the two major predictors. As such, according to this study at least, objective economic indicators seem to be better suited to explaining how individuals migrate than their desire to do so. However, future research should attempt to robustly explain this puzzle.
Although this study takes a comprehensive, "omnibus" approach to explaining emigration (with the shortcomings in robustness that that inevitably entails), it also attempted to contribute four theoretically novel psychological factors: feeling stressed by life, feeling depressed, interpersonal trust, and feeling free to do what one wants. Evidence of effects was mixed. Feeling stressed by life was one of the most prevalent predictors of wanting to emigrate, even when controlling for the variables measuring socio-demographics, political and economic perceptions, and access to migrant networks. The other three were generally not found to have strong effects. However, as a factor of being willing to emigrate without papers, only interpersonal trust is sometimes shown to have an effect, for theoretically intuitive reasons. Moreover, the consistent effect of religiosity and perceptions of one's country's economy, democracy, and levels of corruption all also relate to psychology, not least because they reflect differences within and thus about the same country. As discussed, future research should also consider other psychological schema, such as basic human values and other personality traits and orientations.
Aside from these psychological variables, the other three theoretical approaches all include variables that consistently predict desire to emigrate, as shown in Fig. 4, above. That said, again, national context clearly matters: a few countries often stand out for the direction and statistical significance of the effects in their models, namely Iraq, Kuwait, Libya, Sudan, and Yemen. Notably, the exceptions are entirely socio-demographic indicators-gender, university education, marital status, and income on desire to emigrate and gender and income on willingness to emigrate irregularly. Given the profiles of the outlying countries, this suggests that both extremely high wealth (in the case of Kuwait) and war (in the cases of the other four) interact with and can even reverse these most fundamental determinants of migration. Future research should unpack these relationships further.
Overall, the analyses lead to five contributions to the literature and recommendations for policymakers. First, conceptually, irregular migration can be thought of as a two-step process: first wanting to emigrate in general and second being willing to do so irregularly. By doing this, this study disentangles the determinants of each of them and allows policymakers to design more accurate interventions to, for example, encourage regular migration or discourage irregular migration. Second, by covering 12 countries the study highlights the commonalities across country contexts and provide a generalisable model of the two-step process, demonstrating which variables measuring each of the four theoretical approaches are shown to affect migration. Third, objective economic indicators like income and employment are shown to have weak predictive power when other factors are controlled for, highlighting the importance of thinking beyond just economics when designing policy interventions. Fourth, the predictive power of psychological variables, particularly regarding stress, is highlighted, which should be incorporated into policy design and communication and further investigated. Finally, most countries are shown to have typical determinants of emigration but, tentatively, it seems that those that have suffered war or are extremely rich are shown to be atypical in that the effects of socio-demographics are weakened or even reversed in these situations. The extent to which this relationship can be validated by looking at other rich countries in the Arab world and elsewhere should be investigated.
Overall, according to the country-level averages, those willing to emigrate irregularly are considerably more likely (nearly 50%) to list a European country as their desired destination than a Gulf country or North America (around 20% each). By contrast, those unwilling to emigrate without papers are more evening split, with 30% listing Europe and around 25% listing the Gulf and North America respectively. However, this hides very large variation between countries. Several trends appear: First, respondents in countries in the Maghreb-Algeria, Libya, Morocco, and especially Tunisia-are the most likely to want to migrate to Europe and some of the least likely to list Gulf countries. By contrast, those desiring to migrate from Egypt, Sudan, and Yemen overwhelmingly envisage the Gulf as their destination. Countries in the eastern Mediterranean-Jordan, Lebanon, and Palestine-have more even splits, although citizens in Jordan and Palestine (and similarly Iraq) are more likely to want to emigrate to Turkey whereas those in Lebanon are evenly split between wanting to leave to Europe or North America ( Fig. 6; Tables 6, 7).    Fig. 6 Inverse U-curve relationship between the emigration desire and development (see Table 1 for data) Table 6 Linear regression analyses of propensity to migrate by country  Table 7 Linear regression analyses of propensity to migrate without papers, among those thinking of migrating, by country