In this paper we describe two of the most used distributions for the inefficiency term in a stochastic frontier: the Half Normal and the Exponential distributions. We then show that both distributions affect the skewness of the composite error term in different ways, which make the Exponential...

Following the process initiated by Chile in the early 1980s, most countries in South America have undergone deep transformations in their electric industries. In this new playing field, the comparison of the relative efficiency of several regional monopolies seems to be a potentially valuable...

During the last years, there has been an increasing concern about the importance of competition policy as a mean to increase efficiency in the allocation of resources and the supply and variety of goods and services. Competition between firms provides powerful incentives for cost minimization...