German studies already have supported the existing positive economic effects of works councils, but failed to explain how these effects are produced. New case study based research from the Netherlands has provided a theory consisting of three channels to create economic impact, also including a set of necessary conditions. This article presents a secondary analysis of this theory with the use of a large data set. This quantitative analysis further supports the theory and contains interesting nuances about how the channels work, in particular about the role of the availability of sufficient works council candidates at elections.