Income Smoothing Across EU Regions: a Panel Decomposition of Adjustment Channels

Figure. Clustering the European regions by the unsmoothed share of income shocks

Non-Technical Summary

Over the past twenty years, Europe has faced a series of major economic shocks—from the eurozone crisis to the COVID-19 pandemic and energy price surges—that have disrupted economies and household incomes. These shocks have not affected all regions equally. Some areas recovered quickly, while others struggled, exposing deep differences in how regions absorb and adapt through wages and employment. This uneven resilience has fueled growing concerns about regional inequality and “left-behind” areas, as persistent income gaps threaten the fairness and credibility of EU-wide policies.

In this context, this paper examines the resilience of European household income —a more direct indicator of well-being than GDP - to macroeconomic shocks. We investigate to what extent, when considering disposable income, shocks on wages are partially offset in the short run by other types of income. This is known as “income smoothing” in the economic literature (Deaton, 1992). Using detailed regional data from 2000 to 2020, we provide several empirical insights.

First, only about 30% of wage shocks are smoothed in the EU, rising to nearly 40% in the euro area and 60% in Western Europe. In practical terms, over the last two decades, when a shock affected aggregate wages per head in a European region, decreasing them by €1, disposable income per capita decreased on average by €0.70 in that same region. This decrease was only €0.60 for regions in the euro area. The main mechanisms cushioning these shocks were the higher size of public transfers (social benefits and contributions) and income from real estate and self-employment in the euro area. Migration also played an important role in stabilizing regional incomes, as shown by our distinction between migration and natural population changes.

Second, income smoothing is highly uneven across Europe. Western European regions are better equipped to absorb wage shocks thanks to more diversified mechanisms, including property income (interests, dividends…). In contrast, Central and Eastern Europe and Southern countries such as Greece, Italy, Portugal, and Spain rely on fewer channels, making them more vulnerable. Interestingly, income smoothing does not increase steadily with GDP per capita; it peaks in middle-income regions, suggesting that institutional and structural factors could also matter.

Third, clustering analysis reveals a clear divide between core, semi-peripheral, and peripheral regions. Core regions have stronger and more diversified smoothing mechanisms, while peripheral regions lag behind. Property income and demographic channels are significant only in core regions, indicating that these areas are more attractive and likely have better-functioning capital markets. This creates a “multi-speed” Europe, where some regions recover faster than others. We also show that cluster boundaries do not fully align with national borders, underscoring the value of a regional approach.

In sum, Europe’s ability to protect household incomes during shocks remains incomplete and varies widely across regions. To build a more resilient Union, policies must combine public and private mechanisms and target regions lacking effective income-smoothing tools.

Keywords: Risk-Sharing, Income Smoothing, Currency Unions, Migration

Codes JEL : E21, F22, F36, F45, G15