摘要: This article explores the use of a negative pollution tax to control erosion in semiarid agriculture. operates on setting either one or two threshold levels. With levels, T-max identifies maximum acceptable limit and T-min desirable target level. Above T-max, fines penalties are imposed; below T-min, farm, county, state is paid for their superior achievement. Although from theoretical perspective has several attractive features, an operational political point view many obstacles its implementation must be surmounted.