%X This study analyses the effect of active labour market policies on regional (NUTS-2) job polarization. This is done to provide policymakers with a useful framework to examine the possible causes for job polarization on a regional level. This is done by using the European Labour Force Survey, openness to trade data and data on active labour market policies. A comprehensive model is established containing the three main explanatory factors for job polarization: technological change, globalization, and institutions. In addition, multiple interaction effects and control variables are added to make the model more robust. After adding interaction effects and control variables, it is found that active labour market policies decrease inequality in hours worked in a region. This conclusion can help adapt to the changing labour market demands, if policymakers react to the threat of job polarization adequately; they might prevent people from falling behind on the labour market. %A Wierd Folkertsma %D 2022 %L theses_frw3769 %T Different degrees, the same causes? Analysing the mechanisms underlying the degree of job polarization across NUTS-2 regions