The British Columbia halibut fishery provides a natural experiment of the effects of "privatizing the commons". Using firm-level data from the fishery two years before private harvesting rights were introduced, the year they were implemented and three years afterwards, a stochastic frontier is...

Sata Envelopment Analysis (DEA) of efficiency is highly sensitive to the level of aggregation. Generally as the number of inputs and outputs increase, differences in measured relative efficiency across firms decrease. This paper advocates using the EKS index number formula to aggreagte inputs...

Technical progress in matching models of the labour market has received serious attention. This paper examines the impact of the results of these models when an attemp is made to allow time to enter in a realistic fashion. Also, different parametric representations of the matching technology are...

A firm may be an outlier either in terms of the mix of scale of its input-output vector. This paper develops separate mix and scale outlier measures. The mix measure is particularly relevant to Data Envelopment Analysis (DEA) since it will identify the firms thart exert influence on the...