Labour mobility and labour market adjustment in the EU
© The Author(s). 2016
Received: 19 December 2015
Accepted: 12 July 2016
Published: 10 November 2016
This paper assesses the role of labour mobility in the adjustment to asymmetric economic shocks in the EU. After presenting a series of stylised facts of mobility in the EU, it assesses mobility as a channel of economic adjustment by means of a vector autoregression (VAR) analysis in the vein of Blanchard and Katz (BPEA 1:1–75, 1992). Results indicate that, over the period 1970–2013, mobility absorbed about a quarter of an asymmetric shock within 1 year. Movements in response to shocks have almost doubled since the introduction of the euro. In contrast to previous papers on the labour market adjustment in the EU, the response of wages is integrated to the analysis. It is found that real wages have also become more responsive to asymmetric shocks.
JEL Classification: J61, J64
KeywordsLabour mobility Geographic mobility Migration Adjustment Asymmetric shocks Optimal currency areas European Union
Labour mobility1 received attention in the early debate on the Economic and Monetary Union (EMU). It was stressed that the reduced room for absorbing asymmetric shocks via macroeconomic policy tools in a monetary union required a sufficient degree of labour mobility as an alternative adjustment channel. Empirical analysis revealed that, as compared with other monetary unions, notably the USA, EU countries participating in the EMU did not exhibit a comparable degree of mobility and mobility played a minor role in the process of adjustment (Blanchard and Katz 1992; Decressin and Fatás 1995). Several years have passed since the outburst of the financial crisis, and there is growing attention to the potential contribution of labour mobility to counteract the divergence in growth and unemployment among EU countries and particularly within the euro area.
The financial crisis and the ensuing current account and debt crises in the euro area acted as persistent macroeconomic shocks with asymmetric effects, radically changing the economic landscape of the euro area. The convergence in income per capita observed during the first decade of EMU was to a large extent reversed. Countries in the euro area periphery witnessed capital flight, a protracted contraction in domestic demand amid deleveraging and a marked deterioration in their public finances. The rebalancing process involving adjustment in relative costs and prices between net debtor and net creditor members of the euro area is necessary for a durable reduction of external macroeconomic imbalances and the narrowing of unemployment divergences. Such a process, however, can be long-lasting and marked by considerable distress in the countries enduring competitive internal devaluation and high and protracted unemployment. Against this background, labour mobility would help ease adjustment: it would permit a more moderate reaction of activity rates, and part of the divergence in unemployment rates would be absorbed by mobility rather than real wages.
The paper starts out by assessing main stylised facts and trends of mobility in the EU. Cross-country mobility flows in the EU appear to remain considerably lower as compared with those recorded in other highly integrated areas, most notably the USA, and well below mobility within countries. Moreover, the majority of the population of migrants in most EU Member States is from outside the EU rather than from other EU countries. Nevertheless, cross-EU mobility is on an upward trend and not only due to the enlargement of the EU to Eastern European countries with high outward migration rates.
The main part of the analysis focuses on identifying the dynamic response of labour mobility to labour demand shocks that affect some countries only (asymmetric shocks). To that purpose, a vector autoregression (VAR) model in the spirit of Blanchard and Katz (1992) is estimated for a panel of EU countries. The aim is to assess simultaneously the co-movement of unemployment, labour market participation and labour mobility in response to shocks to labour demand.
As compared with recent analyses (e.g. Dao et al. 2014; Beyer and Smets 2015), the focus is on mobility across countries rather than across regions. This is for two reasons. First, it keeps the analysis close to the type of adjustment that matters in response to country-specific shocks. Second, it permits to explore the behaviour of real wages in response to asymmetric shocks, as this is a key variable to allow the adjustment of relative unemployment rates. Compared with previous studies taking a cross-country perspective (e.g. L’Angevin 2007a, b), the availability of longer time series makes it possible to examine if the contribution of labour mobility to labour market adjustment for the typical country has changed over time, most notably after the 2008–2009 crisis.
Results indicate that labour mobility absorbs about 25 % of asymmetric shocks after 1 year and about 50 % at peak, after about 5 years. It is also shown that the response of mobility, as well as that of real wages, has increased after monetary unification. At peak, the response of mobility for the post-unification period is about twice as large as that for the pre-EMU period.
Some caveats are in order in interpreting these results. First, the Blanchard-Katz methodology followed in this paper and elsewhere identifies migration flows as a residual. The changes in employment that are not explained by changes in unemployment and inactivity are due to changes in the working-age population. Changes in the working-age population that occur in response to labour demand shocks are, in turn, attributed to labour mobility. This method has been devised to circumvent situations in which net migration rates are not available or not sufficiently reliable. In the case of the EU, the available data series “Crude rate of net migration plus statistical adjustment” includes the effects of revisions of population projections by national statistical authorities. Thus, the time series includes a number of revisions and outliers, which makes its time series properties less than ideal (see Additional file 1 on data sources on migration in the EU).
Second, the paper focuses on labour mobility within the EU. However, due to data availability, it is in some cases hard to disentangle whether mobility takes place fully within the EU or also involving third countries. In particular, the VAR analysis cannot distinguish between flows within the EU and with third countries. Such a distinction, although relevant from the perspective of the smooth working of the monetary union, is seldom pursued in similar analyses, partly because of the lack of sufficient data, but also because what is relevant from the viewpoint of the adjustment for the single country is the response of labour mobility to shocks, irrespective whether mobility flows take place with another member of the monetary union.
The paper is organised as follows. Section 2 reviews the case for labour mobility as an economic adjustment channel in a monetary union. Section 3 presents a number of stylised facts of mobility in the EU to serve as context for the main analysis, in Section 4, which assesses the dynamic response of labour mobility to country-specific economic shocks. Section 5 concludes.
2 Labour mobility as an adjustment channel in a monetary union
In a monetary union, asymmetric economic shocks (i.e. shocks affecting some members but not others) are expected to initially cause differences in unemployment and activity rates, which are absorbed over time via the adjustment of real wages and via geographical mobility. In a country hit by a positive labour demand shock, workers are initially drawn from the unemployment pool and more inactive workers start entering the labour force. Over time, real wages rise and, if the shock persists, the labour force starts growing also thanks to the inflow of workers from other geographical locations. Similar dynamics play out in the opposite direction in case of a negative shock.
Since the onset of the monetary union, labour mobility within the EU attracted attention in the academic and policy debate. In the early debate on EMU, it was stressed that the relatively low degree of labour mobility among EU countries would be a weakness of the forthcoming monetary union. The loss of exchange rate flexibility and an independent monetary policy would require alternative channels of adjustment in the presence of asymmetric shocks. In the absence of an independent monetary policy, countries hit by persistent negative shocks would face high unemployment for protracted periods, with high economic and social costs, unless there is a sufficient degree of flexibility in real wages or a sufficiently mobile labour force. These were seen among the conditions for the EMU countries to be part of an “optimal currency area”.2
The low degree of labour mobility across EU countries as compared with US states can be linked to language and cultural differences, largely heterogeneous policy contexts, notably concerning the labour market and fiscal and social welfare policies. Some reasons underlying reduced labour mobility within Europe were considered to be linked to persisting legal and administrative barriers to the single market ensuing notably from limited portability of welfare rights, recognition of qualifications and access to regulated professions. Despite being a relevant adjustment channel, there are limits to what labour mobility can achieve in terms of shock absorption and there are costs that need not be neglected.
The strongest case in favour of adjustment through labour mobility is provided by situations in which persistent asymmetric labour demand shocks lead to persistent unemployment differences due to the rigidity of real wages. In such a context, labour mobility is likely to result in lower overall unemployment and relatively limited impact on the rest of the population in both the source and the destination country. On the other hand, it is well known that, under fully flexible wages, migration is likely to bring aggregate gains but with redistribution in the short term in favour of source country workers and against destination country workers, which see their earnings reduced in light of an increased supply of labour (e.g. Borjas 1999). Moreover, migration may not be necessary in case of short-lived, temporary shocks, as national automatic stabilisers could be sufficient to deal with temporary unemployment.
It should also be added that the effects of labour mobility go beyond those considered in standard, simplified, static models of international economics. In particular, from the viewpoint of the source country, the migration of skilled labour and the consequent phenomenon of brain drain may lower TFP and income growth rates (Commander et al. 2004). Moreover, in the presence of large differences in tax and welfare policies across countries, migration could entail additional redistribution effects via the public budget, and the implications of government debt for future generations could be exacerbated by large-scale outward migration.
Finally, there is ample evidence showing that individual perceptions and attitudes towards migration tend to be more negative than justified on the basis of economic outcomes only, which constitutes an additional limit to what labour mobility can achieve by itself as a channel of adjustment to asymmetric shocks (e.g. Mayda 2006).
3 Labour mobility in the EU: stylised facts
Second, mobility across the EU has been increasing over the past two decades, as measured by the share of EU population born in a different EU country (also documented in Fig. 1). The increase is particularly evident when looking at data for the post-enlargement EU. Mobility rates are higher across the enlarged EU and have been on an upward trend since the mid-2000s. This is mostly the result of large and growing flows from countries of new accession, notably Eastern European countries. However, growing mobility is not only from East to West. Mobility among countries that were members of the EU before the 2004 enlargement also exhibits a positive, albeit moderate, trend over the past two decades.4 Conversely, over the same period, mobility within the USA appears to be on a downward trend, although from a higher level (Molloy et al. 2011; 2014).
Third, while migration from outside the EU was more significant than intra-EU mobility in the past, the two are of comparable weight in recent years. This has two consequences for the present analysis. First, it provides another indication to the effect that the significance of intra-EU mobility has increased in recent years. Second, it is a reminder that adjustment through labour mobility may happen via the movement of third-country nationals (or via the slowing of immigration from third countries).
Fourth, and finally, a first glance at net migration flows suggests that these are closely related to economic developments.7 Inward migration flows were generally stronger in “old” Member States both before and after the crisis, but some changes took place with the crisis. The countries where the stock of migrants grew most before the crisis included countries on the euro area periphery like Ireland and Spain. In light of the crisis, in these same countries, inflows adjusted downward to a large extent, while the stock of foreign-born population fell substantially in the Baltic countries.
This paper analyses the relationship between migration flows and labour market developments. While a caveat is in order in the sense that not all migration is related to labour market reasons, indirect evidence suggests that the link is close: most of migrants tend to be in prime working age, and their level of labour market integration is comparable to the population born in the country.8
4 Cross-country labour mobility and adjustment: a general framework
4.1 Point of departure and previous findings
With limited data on labour mobility, the standard approach in the literature is to follow the methodology by Blanchard and Katz (1992). Blanchard and Katz (1992) depart from the observation that changes in relative employment levels across US states persist over time, while relative unemployment and activity rates are stationary variables (i.e. shocks to these variables fade away after some time). The main idea is that if asymmetric shocks have permanent effect on employment but not on unemployment and activity rates, the change in employment levels must be absorbed by changes in the working-age population. Assuming that labour demand shocks do not influence demographic trends, the response of relative population must reflect the response of labour mobility.
Blanchard and Katz (1992) find that, in a typical US state, a 1 % transitory negative labour demand shock raises the unemployment rate by 0.32 percentage points above the national average in the first year and lowers the activity rate by 0.17 percentage points. The effects on the unemployment and activity rates disappear after 5 to 7 years; those on relative employment gradually build up, peaking at −2 % after 4 years. This pattern implies a substantial role of inter-state mobility in the first years following the shock.
Decomposition of the response of labour market variables after 1 year to an asymmetric labour demand shock
Euro area (12 Member States 1973–2005) (1)
EU (51 regions 1975–1987) (2)
EU (47 regions 1977–2011) (3)
EU (NUTS1 regions 1998–2009) (4)
USA (51 States 1978–1990) (5)
USA (51 States 1958–1990) (2)
USA (51 States 1976–1995) (6)
USA (51 States 1976–2005) (1)
USA (51 States 1977–2011) (3)
USA (51 States 1977–2009) (4)
Spain (1976–1994) (7)
Italy (1969–1995) (6)
Germany (1970–1993) (6)
UK (1969–1994) (6)
Canada (1976–1996) (6)
Decressin and Fatás (1995) apply the Blanchard-Katz framework to investigate regional labour mobility in the EU and compare the results to those obtained for the US states. Their sample covers the period 1975–1987 and comprises regions for France, Germany, Italy, the UK and Spain; Belgium, Denmark, Ireland, Greece, the Netherlands and Portugal are taken as single regions. They find that the labour market adjustment in the EU is characterised by a muted response of labour mobility as compared with the USA, while the response of activity rates appear stronger. In Europe, it takes about 4 years for the effect on the activity rate and unemployment rate to disappear. In the USA, net inter-state mobility accounts within the first year for 52 % of the change in the relative employment and after 3 years for 70 %. In Europe, it is only after the third year that mobility accounts for a proportion similar to that reached in the USA after only 1 year.
Bentolila and Jimeno (1998) analyse the response of the typical Spanish region to a labour demand shock and find that for the period 1976–1994, unemployment bears a significant fraction of the adjustment, accounting for about one third of the change in employment after 3 years.
Dao et al. (2014) reassess the adjustment of the US states extending the Blanchard and Katz sample to 20 additional years. Compared to Blanchard and Katz, they find that the role of participation and unemployment has increased, while the contribution of inter-state mobility has decreased. Applying the methodology to European regions, they find that the short-term response of labour mobility has increased over time.
Beyer and Smets (2015) reconsider the comparison between the US and European labour market adjustments made by Decressin and Fatás. In particular, they assess separately the adjustment to region-specific shocks, to common shocks with asymmetric effects and to national shocks. They find that a significant difference between the EU and the USA can be found only in the response of mobility to common shocks with asymmetric effects. In contrast, the mobility response to region-specific shocks plays a relatively minor role both for the EU and the USA and appears to fall over time. Finally, inter-country mobility in response to country-specific shocks is less important than the inter-regional mobility in response to region-specific shocks.
Most studies on the EU focus on regional labour market adjustment. Only few have looked at the role of labour mobility for national labour market dynamics. In a study on the euro area covering the period 1970–2005, L’Angevin (2007b) finds that inter-state mobility plays a minor role in euro area countries and that, compared to the USA, it takes more time for unemployment and participation to return to a long-run equilibrium after the shock.9 Yet, restricting the sample to the period 1990–2005, the euro area labour market responds similarly to that of the USA, with a larger contribution of labour mobility in the medium term.
4.2 Specification of the VAR framework
All variables are in logarithms to allow a simple linear formulation. More importantly, all variables are expressed as relative to the (weighted) average of the countries in the sample. This removes trends that are common to all countries and allows the focus on asymmetric (rather than common) shocks.
Employment growth is determined by country-specific factors x di and x si . In countries more attractive to companies, the inflow of firms leads to higher wages and lower unemployment, which stimulates the arrival of workers that allow for employment growth to be permanently higher. In countries more attractive to individuals, the inflow of workers pushes wages down and unemployment up. Labour and firm mobility ensures that the effect of labour demand shocks on relative wages, unemployment and participation rates are transitory.
Since variables are expressed relative to their aggregate EU counterparts, Eq. (3) can be seen as characterising the mobility of workers on the basis of relative wages and relative unemployment.10 If one country is hit by a negative asymmetric demand shock, wages and employment decrease. Lower wages and higher unemployment leads to net out-migration of workers, which mitigates the unemployment and wage effects; lower wages also attract firms, sustaining job creation and wages. The overall effect depends on the elasticity of relative labour demand and relative labour supply.
A VAR model can be estimated to investigate the response of employment, unemployment and participation rate to an asymmetric labour demand shock, i.e. all variables are expressed as deviations from the respective EU averages. The fact that asymmetric shocks have a permanent effect on employment levels but not on unemployment and participation rates has two consequences. First, the change in employment levels must occur through labour mobility. Second, the VAR should be estimated with the relative employment in first differences and the employment rate (defined in this methodology as 1 − unemployment rate) and the activity rate in levels.
The hypothesis that innovations to the employment growth represent labour demand shocks is implemented through orthogonalised (i.e. uncorrelated) shocks. Since the variance-covariance matrix of the estimated errors ε t is unlikely to be diagonal (i.e. errors in the equation are likely to be correlated), the residuals of the equations have to be decomposed in such a way that they become orthogonal. The Cholesky decomposition represents the standard way to do this. In practice, it consists in ordering the variables in the VAR so that shocks to the variables that come earlier affect the following variables contemporaneously, while those that came after affect the previous variables only with a lag. In particular, it is assumed that labour demand shocks affect the unemployment rate and the participation rate contemporaneously, with a delayed feedback on employment growth. This implies that changes in the relative employment growth within the year reflect country-specific labour demand shocks. Supply-side shock effects are assumed to operate through uncorrelated shocks to the employment rate or the participation rate.
Another identifying assumption is that country-specific characteristics create constant differences across countries that can be modelled as fixed effects f i . Since the fixed effects are correlated with the regressors through the lagged dependent variables, fixed effects are eliminated expressing variables as deviation from their country-specific means. Thus, a panel VAR of order 2 (i.e. two lags for each variable) is estimated with OLS pooling the EU countries after having demeaned the variables to remove country fixed effects.
The availability of data on wages at the national level allows to explore how much of a labour demand shock is absorbed by changes in relative real wages. The inclusion of wages in some specifications allows for a better identification of the labour demand shock, where their response should be positive, from labour supply shock, where their response should be negative. In the identification of the shocks, real wages are assumed to respond contemporaneously to labour demand shocks and to affect contemporaneously the labour supply through changes in the employment or in the activity rate.11
Finally, note that, as is standard practice in the literature (e.g. Blanchard and Katz 1992; Obstfeld and Peri 1998; Dao et al. 2014), net migration flows are determined through the arithmetic linking of (changes in) population with (changes in) employment, unemployment and active population. If P is the working-age population, L is the labour force and N is employment, then this arithmetic can be expressed as P = N + (L − N) + (P − L) = N + (1 − e)L + (1 − p)P, where e is the employment rate (defined here as 1 − unemployment rate) and p is the participation rate. From this, it follows that the relationship between the growth rates (percentage changes) of these variables (approximately equal to the change of a variable in logs) is linear: dlog P = dlog N − dlog e − dlog p.
It is a plausible assumption that the responses of the working-age population to labour demand shocks are driven by geographical mobility, but additional empirical arguments can be found. Indeed, the correlation between employment growth and the series “crude rate of net migration and statistical adjustment” is 0.42 in the EU-15 for the 1980–2014 period and 0.54 for the period after 1998. Correlation remains high and significant even when the series are detrended.
4.3 Labour market adjustment: descriptive analysis
Before exploring the contribution of labour mobility to labour market adjustment, it is useful to review some stylised facts on the dynamics of employment, unemployment and labour market participation across EU countries.
The analysis is conducted on an annual panel database that includes the 15 members of the EU before enlargement for the period 1970–2013. Data are taken from the Annual Macro-economic (AMECO) database of the European Commission’s DG ECFIN. Employment and compensation per employee are from national accounts, unemployment and the activity rate from the Labour Force Survey; compensation per employee is deflated with the GDP deflator.12
Supporting the methodological validity of the Blanchard-Katz approach, relative employment growth and relative changes in the activity and unemployment rates tend to oscillate around constant averages.
For some countries (e.g. Austria, Germany and Ireland until the crisis), national developments diverge only temporarily from the EU average, which is suggestive of the importance of common shocks.
The recessions that followed the two oil shocks of the early 1970s had only a temporary effect on employment growth in several countries. This contrasts markedly with the persistent effects of the financial crises that hit Sweden and Finland in the early 1990s or with the effects of the 2008 financial crisis in Greece, Portugal and Spain. For these countries, shocks to employment growth had more persistent effects on unemployment, consistent with the evidence presented by Calvo et al. (2012) that labour market adjustment is sluggish particularly in recessions induced by disruptions of the credit channel.13
Fluctuations in employment growth relative to the EU average are matched by changes in either the activity or the unemployment rate or both. For example, fluctuations in employment growth were accompanied by changes in relative unemployment in Germany, Ireland, Italy and Finland, while in the Netherlands, France and Sweden, relative employment growth moves together with the relative activity rate.
As shown above, the difference between employment growth and the sum of the percentage change of activity and employment rates must equal the percentage change in the working-age population which in turn reflects labour mobility flows. A tendency towards greater inward mobility is visible in Spain, Ireland, Luxemburg and the Netherlands; outward mobility is observed in Finland, Portugal and Sweden. A sustained inflow of workers characterised the increase in the Spanish and Irish employment before the 2008 crisis. The crisis reversed only partly this trend, with the negative labour demand shock leading to huge job destruction and a limited decline in the growth of the working-age population. This pattern contrasts with that of Finland following the recession of the early 1990s, when a strong increase in unemployment was accompanied by a persistent and sizeable decline in the activity rate.
Common labour market disturbances: 1970–2013
R 2 adj
R 2 adj
R 2 adj
Average D&F (1995)
On average, 40 % of the fluctuations in national employment growth are explained by EU-15 developments, which is consistent with findings by L’Angevin (2007a, b) over the 1973–2005 period. This suggests that common shocks in the EU are more relevant at the country than at the regional level but less relevant than in the case of US states.14
Employment growth is highly correlated with EU-level developments for the majority of countries; asymmetric shocks seem to prevail in Austria, Denmark, Greece and Luxembourg.
Country-level unemployment rates are in general generally more strongly correlated with the EU aggregate than in the case of employment growth. The same is true for activity rates, with the notable exceptions of Denmark, Finland and Sweden.
4.4 Adjustment to asymmetric labour demand shocks: evidence
Results from the VAR model estimations are summarised by the corresponding impulse-response functions, showing the response of variables to a one-standard-deviation positive labour demand shock. The regression output from the estimation of two model variants (excluding and including wages) is presented in Additional file 2.
The results suggest that, as expected, labour demand shocks result mostly in a variation of unemployment and activity rates on impact. These effects dissipate very slowly over time. In contrast, the effect on mobility and real wages is smaller on impact and builds up gradually.
Over the period 1970–2013, the average size of the labour demand shocks identified is about 1.1 %. The effect on employment is persistent and reaches a maximum after about 4 years, before falling to a value permanently higher than the initial level. Within 1 year, the unemployment rate falls and the activity rate rises respectively by about 0.5 and 0.3 percentage points above the EU average. The effect of the shock on the unemployment and activity rates is very persistent and lasts beyond 5 years.
Labour mobility increases by 0.3 % the first year and peaks after about 10 years. Thus, in the first year, the unemployment rate, the activity rate and labour mobility absorb respectively 43, 32 and 25 % of the initial labour demand shock. The proportion of the initial demand shock absorbed by changes in the population rises over time.
All in all, in analogy with previous studies, results indicate that, over the medium term, the large majority of asymmetric demand shocks are absorbed via an adjustment in relative activity rates and mobility, the former being more responsive in the first years after the shock, while the latter becoming predominant after some years.
Over the pre-crisis sample (1970–2007), the average shock is estimated to be about equally sized but more persistent. In response to the shock, within the first year, the unemployment rate declines by 0.3 percentage points and the activity rate increases by 0.4 percentage points. Within the first year, the unemployment rate and the activity rate absorb about 34 and 38 %, respectively, of the labour demand shock.16 Compared to the whole sample, the response of unemployment is weaker and more persistent; in contrast, the response of the activity rate is larger and more persistent. A key difference across the two periods is found in the response of labour mobility, which appears less responsive to the shock in the pre-crisis period. In the whole sample, the response is about 0.5 % after 5 years, while it is below 0.4 % in the pre-crisis sample.
In the long term, the increase of the labour supply through higher activity rate and greater labour mobility accounts for respectively 40 and 60 % of the overall increase in employment. The figures for the pre-crisis period are 40 and 50 %. It also emerges that, while for the whole sample in less than 8 years mobility becomes the prominent form of adjustment, for the pre-crisis period, it takes more than 11 years for mobility to overtake activity rates as the most relevant adjustment channel.
The evidence suggests that since the start of the 2008 crisis, mobility has played a more important role in the adjustment of labour markets than in the past; in contrast, the adjustment of unemployment and activity rates was comparatively short-lived. This is consistent with the observation that activity rates were resilient in the EU since 2008, while discouragement effects appear to have been weaker than in previous downturns.17
These findings remain largely unchanged when real wages are included in the analysis. For the whole sample, relative real wages gradually increase in response to the positive labour demand shock and stabilise after about 10 years, broadly in parallel with the stabilisation of unemployment. In response to a 1 % shock, relative wages change by about 0.5 % after 10 years. Including wages in the model does not appear to matter greatly for the adjustment of the relative unemployment rate, consistent with the findings of Blanchard and Katz (1992) for the US states and Bayoumi et al. (2006) for Canadian provinces.18
When restricting the sample to the pre-crisis period, the response of real wages appears considerably more muted. Thus, since 2008, relative wages have become more reactive to country-specific cyclical conditions.
First, despite the fact that the estimated average labour demand shock is about equally sized over the two periods (1.1 % in the first period and 1.0 % in the second), the response of unemployment is quicker and less persistent in the EMU period.19 Second, the activity rate exhibits a more muted and short-lived reaction to the shock. Third, labour mobility appears to respond more quickly during the EMU period, absorbing a bigger fraction of the shock than the activity rate at any lag.20 A possible explanation for this finding could be linked to the fact that activity rates in EU countries have been driven to larger extent by structural factors, including linked to reforms and policies facilitating labour market participation by females and the elderly, and less by cyclical factors. Moreover, the more rapid response of the working-age population may reflect more the effect of enlargement than a migration of national citizens. Finally, real wages in the EMU period seem to be more reactive to country-specific labour demand shocks. Before the EMU, the response of real wages to the shock is initially muted and becomes statistically significant after 5 years. In the post-EMU period, wages are significantly different from the pre-shock level after the second year.21
Variance decomposition: percentage of the variance of each variable explained by a country-specific labour demand shock
Years after the shock
Growth of relative real wages
Growth of relative real wages
Before EMU, labour demand shocks account for a sizeable proportion of the variance of the activity rate, while these shocks are less relevant for wages or labour mobility. After monetary unification, there is a considerable change in the relative importance of labour demand shocks. Within 1 year, they still remain more important for the activity rate than for labour mobility or real wage growth; however, over the medium to the long run, labour demand shocks become relatively more important for the variance of labour mobility. These results underscore the increased role of wages and mobility as adjustment mechanism to asymmetric labour demand shocks.
Cross-country mobility flows in the EU are still much lower than those recorded in other highly integrated economic areas, notably the USA, and well below mobility within countries. The population of migrants from within the EU is also generally much lower than the population of migrants from outside the EU. Nevertheless, an upward trend in mobility is visible in the EU, not only as a result of the enlargement.
The analysis of the dynamic response of mobility flows to asymmetric shocks in the vein of Blanchard and Katz (1992) confirms previous findings that in Europe, unemployment and labour market participation absorb the largest fraction of asymmetric labour demand shocks in the short to medium term. Over the period 1970–2013, about one quarter of asymmetric labour demand shocks are absorbed by labour mobility within 1 year, while about 50 % of the shock is absorbed after 5 years, an estimate which is in line with that obtained in previous studies. The paper shows, in line with L’Angevin (2007a, b) and Dao et al (2014), that the importance of mobility as an adjustment mechanism has increased in the EU. In contrast to previous studies, this paper integrates wage developments into the analysis. It finds that the response of real wages to demand shocks has also strengthened after the inception of the euro.
Beyer and Smets (2015) found that the role of labour mobility as adjustment mechanism for the EU regions has fallen over the period 1994–2011; their analysis is however not in contradiction with that of this paper, which focuses on mobility across countries and not regions. The difference suggests that mobility adjustment within the EU is triggered more by country than by region-specific shocks.
Overall, the findings of this paper suggest that, although the magnitude of mobility flows in the EU remains below what could be expected in a fully integrated monetary union, the responsiveness of labour mobility to asymmetric demand shocks has increased over time.
Further analysis is needed to investigate the reasons underlying such increased responsiveness of mobility flows, notably the relative roles of enlargement (see, e.g. Jauer et al. 2014) and the loss of the exchange rate and an independent monetary policy as shock absorbers. The analysis also suggests that, in the coming years, the persistence of the large unemployment differentials observed after the crisis could entail cross-country labour mobility flows of a considerable magnitude, which could require in some cases supportive policy frameworks to ensure the effective integration of mobile workers.
In this paper, the terms “mobility” and “migration” will be used interchangeably, although in the EU policy context, mobility refers to movements within the EU and migration to movements between EU and non-EU countries.
In the USA, the population share of working-age people born outside the USA is 16 % or about half the share of people who moved from one state to another (own calculations based on the Pew Research Center (2012) tabulation of the 2010 US Census).
Data, based on the EU Labour Force Survey, which allows a differentiation between EU and non-EU migrants, go back to 2005 (see Additional file 1 on the data sources).
Section 4 of the previous working paper version of this paper includes a separate analysis of the determinants of bilateral gross migration flows. The analysis confirms that labour market conditions (i.e. the unemployment rate) are a significant determinant of these flows both globally and among EU countries.
For more detail on this point, see the working paper version of this article.
The effect of an asymmetric shock fades away after 7–8 years in the USA and only after 15–20 years in the euro area. However, after 1990, the persistence of national unemployment rates has diminished in the euro area.
In previous versions of the paper (including European Commission, 2015, Chapter II.1, Section 4), it is shown that relative GDP per capita and relative unemployment are key determinants of gross bilateral migration flows.
The identification strategy orders the variables in a way that real wages come after employment growth but before the other variables. The log of relative real wages is included in the VAR as first differences (i.e. they are assumed to be non-stationary). Panel unit root tests confirm their non-stationarity.
A previous working paper version of this article includes analysis on a selected number of individual countries (Germany, Spain, France, Ireland, Italy and the UK). In the country-specific analysis, quarterly data were used.
Calvo et al. (2012) showed that recoveries that follow deep recessions are jobless or wageless depending on the pattern of inflation during the recession episodes.
While it is easy to derive confidence intervals for the response of employment growth and the unemployment and activity rates, this is not the case for migration which is obtained as a residual from the estimated response of these variables. Confidence intervals for the migration response could potentially be obtained by bootstrapping methods, but this has not been done either by Blanchard and Katz (1992) or by recent contributions like Beyer and Smets (2015).
The response of the unemployment rate up to 4 years after the shock stays within the standard errors computed over the whole period; after the fourth year, the dynamics of the unemployment rate does not differ over the two samples. In contrast, the response of the activity rate is always within the standard errors computed for the whole period.
These findings are robust to a specification where wages are an exogenous variable. The results are also robust to a different identification scheme where wages respond contemporaneously to labour demand and labour supply shocks but affect the unemployment and the activity rates only with a lag. Finally, the results do not change significantly for a specification where relative wages are stationary.
This may reflect the persistency of the labour demand shock itself which is lower in the post-EMU period.
This is consistent with the results obtained by L’Angevin (2007a, b) comparing the 1990–2005 period with that over the 1970–2005 period. Results are robust to the exclusion from the sample of Denmark, Sweden and the UK.
This finding is influenced substantially by change of relative wages over 2012–2013; in fact, the dynamic adjustment of real wages is closer when the response computed for the 1999–2011 period is closer to that of the pre- than to that of the post-EMU period.
We would like to thank an anonymous referee and the editor for the useful remarks.
This paper is based on Chapter II.1 of the Report “Labour Market and Wage Developments in Europe 2015” of DG EMPL, European Commission (European Commission 2015; not including Section 4 of that chapter). It appeared as a working paper (Economic Paper 539) in the European Economy series of the European Commission and as IZA Policy Paper No. 106. An abridged, nontechnical summary appeared in the Quarterly Report on the Euro Area of the European Commission (first quarter of 2015). Opinions expressed in this paper are those of the authors and may not reflect the views of the European Commission. The authors would like to thank Laurent Aujean, Robert Anderton, Anne Bucher, Lewis Dijkstra, Georg Fischer, Valerie Jarvis, Robert Strauss and Sebastian Weber for the helpful comments as well as Prakash Loungani and Davide Furceri for the useful discussions. This research has been conducted while all the authors were at DG ECFIN.
Responsible editor: Denis Fougère
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