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By the mid-1990s the potential and usefulness of microsimulation models for researching tax-benefit systems had found widespread acceptance. Nevertheless, models were not widely available for independent or academic research in all countries of the European Union (EU). Even more important, carrying out consistent comparative tax-benefit microsimulation analysis was still an apparently impossible task. The time seemed ready for a European-Union-wide tax-benefit microsimulation model. Such a model, EUROMOD, is now available.

This chapter is devoted to a short introduction to EUROMOD, including the reasons why it was built, its added value compared to existing models, the trade-offs faced by its builders and lessons that have been learnt from developing such an integrated model. Moreover, it aims to provide an insight into the wide range of possible applications of EUROMOD, underlined by summarizing some indicative findings of studies, which have used the model.

European countries have the world’s most redistributive tax and transfer systems. While they have been well equipped to deal with vertical inequality – fostering redistribution from the rich to the poor – less is known about their performance in dealing with horizontal inequality, that is, in redistributing across socioeconomic groups. In a context where individuals may not only care about vertical redistribution, but also about the economic situation of the specific groups they belong to, the horizontal dimension of redistribution becomes politically salient and can be a source of social tensions. The authors analyse the performance of the 28 EU countries for redistribution across (i) age groups; (ii) occupational groups; and (iii) household types over the period 2007–2014 using counterfactual simulation techniques. We find a significant degree of heterogeneity across countries: changes in the tax and transfer system have particularly hit the young and the losers of occupational change in Eastern European countries, while households with greater economic security have benefited from these changes. The findings of this study suggest that horizontal inequality is a dimension which policy-makers should take into account when reforming tax and transfer systems.

As unemployment rises across the European Union (EU), it is important to understand the extent to which the incomes of the new unemployed are protected by tax–benefit systems and to assess the cost pressures on the social protection systems of this increase in unemployment. This chapter uses the EU tax–benefit model EUROMOD to explore these issues, comparing effects in five EU countries. It provides evidence on the differing degrees of resilience of the household incomes of the newly unemployed due to the variations in the protection offered by the tax–benefit systems, according to whether unemployment benefit is payable, the household situation of the unemployed person and across countries.

Regional minimum income (RMI) schemes have been a fundamental tool for fighting poverty in Spain at a regional level. However, the redistributive power of these schemes has not been as effective as was expected in reducing inequality during the last decades. On the other hand, the introduction of the new ‘Minimum Vital Income’ (MVI) by the Spanish Central Government represents a novel measure for fighting poverty, by guaranteeing minimum incomes from a national perspective as a policy response to the asymmetric impact of the COVID-19 crisis upon income distribution. Using EUROMOD,¹ this paper simulates both the distributional effects of the introduction of the MVI and what the effects on inequality and poverty in each Spanish region would be if the national scheme were to substitute the current regional schemes. The results referring to MVI introduction indicate that inequality and poverty would decrease in all dimensions: incidence, intensity, and inequality among the poor (Foster–Greer–Thorbecke poverty measures). Additionally, the negative effects of RMI elimination would be offset by the positive effects of MVI introduction for most regions, leading us to consider that the simulated scenario entails better redistributive results, as well as additional savings for Spanish Public Accounts, in a context of growing debt. Our findings can provide public policy-makers with useful information about the convenience of fighting poverty at a national level as regards distribution and revenue.

A method of systematically assessing the “first-round” impact of tax and transfer policy changes on the income distribution and the incidence of relative income poverty is proposed. It involves the construction of a “distributionally neutral” policy, which can be approximated by a policy that indexes tax allowances, credits and bands and welfare payment rates in line with a broad measure of income growth. The impact of actual policy changes in five EU countries over the 1998–2001 period is then measured against this benchmark, using the EUROMOD tax-benefit model.

Research has shown that the tax treatment of replacement incomes differs considerably among countries. Consequently, the ranking of countries by expenditure level is different for gross and net social expenditures. On a micro level this is translated into a gap between gross and net benefits; this gap varies among countries. In this chapter, we use EUROMOD for an international comparison of the difference between gross and net benefits at the micro level. We investigate the distribution effects of the income tax treatment of replacement benefits, focusing on old-age pensions and unemployment benefits. We present a summary overview of the different ways of levying taxes on benefits in the pre-2004 EU-15 countries. We then try to answer the question how the tax treatment of social security benefits affects the distribution of these benefits and how progressive taxes on benefits are compared to taxes on earnings.