At the end of 1997 and after twenty-five years of duty, Professor Simon Kuipers retired as managing editor of De Economist. As a token of indebtedness and gratitude, this article reviews Kuipers' written work. The article focuses on two topics that dominate Kuipers' endeavours. First, his contributions to macroeconomic theory, with particular emphasis on his (neo-)Keynesian approach are examined. Second, Kuipers' contributions to actual monetary and economic policy are discussed, emphasis being placed on his empirical work.