WELTECH carries out in-depth case studies of welfare state reforms with the aim of adapting to technological change in three European countries, Germany, Sweden, and the United Kingdom, as well as comparisons with other adanced democracies. It does so leveraging several theoretical frameworks in the comparative political economy literature. Each of the three cases falls into distinct categories of welfare regimes (continental, social democratic, and liberal) and growth models (export-led, balanced, and demand-led), thus allowing for different reform trajectories to be identified and their political determinants to be analysed based on the specificities of the cases’ welfare regimes and growth models. As a starting point, WELTECH traced major reform efforts between 2000 and 2020 based on national legislation and European database LABREF according to the social investment paradigm, which is used as a benchmark framework to understand future-oriented welfare state reforms. In a second step, the project provided an indicator of social investment reforms based on both qualitative and quantitative data. Third, the project distills the particular reform needs in each of the three cases based on their growth models and welfare regimes accounting for economic necessity and institutional path dependence. These are used to determine whether social investment reforms correlate with these needs in order to gauge whether observed differences across the cases are determined by factors relating to a country’s previous institutional configuration and growth model. As part of these in-depth case studies, additional qualitative evidence is used to determine the impact of particular groups including economic elites, bureaucrats, and policy makers. The most important findings are that (1) there have indeed been a number of slow yet transformative changes to welfare states aimed at mitigating the adverse effects from technological change such as skill obsolescence; (2) there is some convergence in the reform trajectories onto the social investment paradigm suggesting that social policy is no longer seen purely as a vehicle for redistribution and decommodification, but as a productive instrument that seeks to channel structural changes into higher levels of productivity and economic participation while increasing inclusion and tackling inequality; (3) differences across the case studies remain, and they go beyond institutional path dependence; (4) a country’s growth model crucially impacts welfare state reform trajectories; (5) policy makers, once elected, appear to undergo a Gestaltswitch forcing them to consider which reforms are best-suited to induce economic growth taking into account the country’s specific growth model; regardless of party colours, and, in fact, at times against party tradition, policy makers cater to the social bloc made up of workers and producer groups in the most important sectors.