Lang, Mahlon George.  “Economic Efficiency and Policy Comparisons”
American Journal of Agricultural Economics
November 1980

Page 773

It is possible to achieve different economically efficient allocations of resources when different initial endowments of property rights shape market exchange. Under different definitions of property rights affecting factor use, the firm can still achieve overall productive efficiency with respect to the remaining variable factors of production. Each definition will raise or lower private, pecuniary costs of production depending on whether irrigated water is publically subsidized in the first place as, in fact, it is. Thus, given each definition of property rights, productive efficiency would be achievable and consistent with economic efficiency depending on public goals with respect to the output….