We provide the first econometric study of efficiency for a member of the Mondragon group of worker cooperatives. Eroski is a retail distribution chain and, most unusually, there are two distinct types of hypermarkets: (i) cooperatives with significant employee ownership and voice; and (ii) GESPAs...

This paper uses a panel of about 6000 French establishments to test some implications of the modern theory of dynamic monopsony or upward sloping labour supply curves for average firm wages. Panel estimates provide strong evidence of a much larger long run employer size - wage effect (ESWE) than...