Different theoretical explanations suggest that worker-managed firms (WMFs) are prone to failure in competitive environments. Using a long panel of Uruguayan firms, the author presents new evidence on firm survival comparing WMFs and conventional firms. Excluding microenterprises and controlling...

Bivariate duration data frequently arise in economics, biostatistics and other areas. In "bivariate frailty models", dependence between the frailties (i.e., unobserved determinants) induces dependence between the durations. Using notions of quadrant dependence, we study restrictions that this...