In empirical productivity analysis it has become customary to use flexible functional forms to represent a firm's production technology by estimating cost functions. In this note we suggest a procedure to calculate the region where an estimated translog cost function meet the required...

It is well-known that switching costs may facilitate monopoly pricing in a market with price competition between two suppliers of a homogenous good, provided the switching cost is above some critical level. With heterogeneous consumers monopoly pricing entails second degree price dierentiotation...

In this paper, we study the effects of introducing endogenous costs in a Tullock model of rent-seeking. We show that unions can be efficiency improving, and that the firms' level of effort depends more critically upon the number of firms participating in the contests when unions are present. We...