Persistently high unemployment rates in Germany have led to a long-running controversy on the causes of the unemployment problem. This paper aims to re­view the contribution of Keynesian and monetarist theories to this controversy and explores empirically their implications for the explanation of high un­em­ploy­ment in Germany using a structural vector regression approach. In addition, this paper discusses the so-called wage gap which plays an important role in the debate whether the German unemployment problem is a real wage problem. Even though this paper cannot hope to settle the unemployment controversy, it nevertheless shows why a consensus has remained elusive.