How to implement a perfect basic income experiment evidence from four countries

Abstract This article presents a comparative analysis of four Basic Income (BI) experiments conducted between 2017 and 2019 in Finland, the Netherlands, Spain, and Uganda. While existing research has focused primarily on economic and behavioural outcomes, this study shifts attention to the political, institutional, and implementation dynamics that shape BI experiments. Drawing on policy implementation, diffusion, and social experimentation theories, the article examines how different governance structures, actor constellations, and institutional settings influenced the initiation, design, and interpretation of these trials. Using qualitative methods, including document analysis and semi-structured interviews, the study identifies key factors that facilitated implementation and policy impact. Findings reveal significant variation across cases, particularly in terms of design autonomy, stakeholder alignment, and political reception. The inclusion of Uganda challenges highlights the transformative potential of BI in low-income contexts. The article concludes by offering practical recommendations for designing more politically viable and institutionally grounded BI experiments.