This paper provides necessary and sufficient conditions for input (or output) aggregation of efficiency indices. As such it parallels earlier arguments in the capital aggregation literature. The resulting quantity-dependent indices provide a rationalisation of the Debreu/Farrell efficiency...

Both researchers and practitioners claim that foreign investors acquire U.S. firms to gain access to reputable brands. There is, however, no empirical evidence to support this argument. This study uses 269 Japanese investments made in the US to test the hypothesis that Japanese investors'...

Duality is studied for an abstract equilibrium problem which generalizes several classical problems including models in optimization and variational problems. Following different schemes, various duals are proposed and primal-dual relationships are established under certain generalized convexity...