A demand curve for land treatment of municipal waste water is derived assuming a profit‐maximizing framework. The outputs of a waste treatment facility are taken to be volume of waste water, degree of waste removal, and potentially marketable by‐product. The demand curve for land treatment technology is estimated by utilizing data collected from 125 U.S. cities. The dependent variable is adoption or non‐adoption of land treatment, and coefficients are estimated by nonlinear regression. The price of by‐products (water), required degree of treatment, price of capital, and local construction cost share all significantly increase adoption. Volume of river flow, rainfall, and volume of effluent flow all have a significant negative effect on adoption. Land prices were insignificant, a factor which is believed to be due to the nonpurchase of land by many land treatment fac
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