[영문]This article discusses reforms of the design of the organisational arena for policy implementation and service provision in European welfare states, focusing on the policy areas of income protection and activation. First, it discusses and compares recent reform programmes in four countries: the UK, Germany, Denmark and the Netherlands. The comparison shows that these reforms share some common characteristics: the establishment of one-stop agencies, decentralisation, the introduction of quasi-markets for the provision of activation services, a reduction of the role and influence of social partners and the use of new public management instruments in managing public agencies. Secondly, the article argues that these reforms are not merely reflecting new ways of thinking about organising the public sector and providing public services, but should also be interpreted as responses to policy administration and implementation problems arising in the process of making welfare states more activating.--------------------------------------------------------------------------------