Though these countries vary significantly in both their federal institutions and labour market policies, they all seek to define a relatively coherent approach for federal and sub-unit governments in a policy field where collaboration and coordination appear unavoidable. In some cases, such as Germany, collaboration is highly developed and policies are ambitious and integrated; in others, such as Switzerland, diversity and decentralization are privileged and policies remain fragmented. Finally, there are countries such as the United States that do not grant much importance to labour market...