1. Estimation of relationships for limited dependent variables;J Tobin;Econometrica,1958
2. Sample selection bias in the estimation of recreation demand functions: An adaptation to sportfishing;N E Bockstael;Land Economics,1992
3. Valuing environmental and natural resources: The econometrics of nonmarket valuation;T C Haab;New Horizons in Environmental Economics,2002
4. Estimating consumer surplus in the censored linear model;D Hellerstein;Land Economics,1992