...Jiawu Dai; Xun Li Purpose The purpose of this paper is to estimate oligopsony power in the upstream factor market and oligopoly power in the downstream product market. On this basis, the paper intends to examine the effects of both oligopsony and oligopoly power as well as ownership on technical...

... concentration and consolidation in the sector. Design/methodology/approach This study uses a new empirical industrial organization model for both oligopoly and oligopsony power to measure the degree of market power exerted on consumers and hog farmers simultaneously. Findings By examining annual panel...