"This paper contributes to the empirical literature on the co-determination - firm performance nexus by using a new type of data that combines information on the co-determination status of enterprises from a commercial data base and supplementary information collected from the firms with comprehensive data on the firms from official statistics. The data allow for the first time a direct comparison of enterprises from the same size class with and without codetermination at the supervisory board level. It is shown that one-third codetermination at the supervisory board level in limited-liability companies from West German manufacturing industries seems to be neither positively nor negatively related to two core firm performance indicators, productivity and profitability."

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