MacKinnon, James G.; Olewiler, Nancy D. - Economics Department, Queen's University - 1978
In this paper, we estimate the demand for refined copper in the United States, taking account of the fact that, during … much of the sample period, copper supplies were rationed. The estimating technique, which is closely related to the Tobit … with institutional evidence of the existence of rationing. They suggest that OLS estimates of the demand for copper, which …
