An important goal of immigration policy is facilitating the entry and supply of workers whose skills are scarce in national labour markets. In recent decades, the introduction of information and communication technology [ICT] fuelled the demand for highly skilled workers at the expense of lower skill groups throughout the developed world. In this paper, we show that the skill mix of newly arriving immigrants strongly responded to this shift in the demand for skills. Exploiting the fact that different regions in Switzerland were differentially exposed to ICT due to their pre-ICT industrial composition, we present evidence suggesting more exposed regions experienced stronger growth in relative employment and wage premia for highly skilled workers between 1990 and 2010. We find robust evidence that regions with higher initial ICT exposure experienced a considerably stronger relative influx of highly skilled immigrants. Taken together, these results strongly suggest that immigrants responded to skill-biased changes in economic opportunities. Complementing these findings, we document whether and how the response of immigrants to skill demand changed when Switzerland abolished immigration restrictions for European workers.

A pervasive, yet little acknowledged feature of international migration to developed countries is that newly arriving immigrants are increasingly highly skilled. This paper analyses the factors affecting the change in the skill composition of immigrants in Switzerland between 1980 and 2010 using a framework suggested by Grogger & Hanson (2011). Our findings suggest that improved schooling in origin countries of immigrants and a shift in the relative demand for highly educated workers in destinations stand out as the two most important drivers. Yet, while improved schooling would predict only a modest increase in the share of highly educated immigrants and a large increase of middle educated immigrants, we show that demand shifts associated with computerisation are crucial to understand why the share of highly educated immigrants increased sharply while the share of middle educated workers merely stabilised. Additionally, our framework allows evaluating the effect of changes in immigration policy. We find that the recent abolition of quotas for workers from European countries through a bilateral agreement with the EU in 2002 had a small but negative effect on the educational quality of immigrants.JEL classification: F22, J61, J24, J31

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A pervasive, yet little acknowledged feature of international migration to developed countries is that newly arriving immigrants are increasingly highly skilled since the 1980s. This paper analyses the determinants of changes in the skill composition of immigrants using a framework suggested by Grogger & Hanson (2011). We focus on Switzerland, which continuously showed very high immigration rates and dramatic changes in the skill composition of immigrants. In addition, the recent integration of Switzerland into the European labour market in 2002 serves as a policy experiment which allows analysing the influence of a reduction on immigration restrictions on immigrants from European countries in comparison to those from other countries. Our findings suggest that changes of education supply in origin countries and shifts to the relative demand for education groups stand out as the two most important drivers. Yet, while supply alone predicts only a modest increase in the case of highly educated workers and a large increase of middle educated workers, one particular demand channel, the polarisation of labour demand induced by the adoption of computer capital, is crucial to explain the sharp increase in highly educated workers and the mere stabilisation of the share of middle educated immigrant workers. The abolition of quotas for EU residents played a smaller role, yet may have slightly reduced the high skill share among immigrants relative to immigrants from other countries.JEL classification: F22, J61, J24, J31

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