turnbull estimates the Turnbull empirical distribution estimator of willingness to pay proposed by Carson et al (1994a,b). Haab and McConnell (1997) argue that this estimator solves the problem of estimating negative willingness to pay without resorting to ad hoc distribution assumptions, and show that central tendency measures of willingness to pay from parametric models are sensitive to the assumed distribution, while the lower bound Turnbull estimate is robust accross distributions.

Joao Pedro Azevedo, 2010. "TURNBULL: Stata module to estimate the Turnbull empirical distribution estimator of willingness to pay," Statistical Software Components S457125, Boston College Department of Economics.

Azevedo, Joao Pedro. What is the Value of Educational Broadcast? (February 2009). Available at SSRN: link

Carson, R. T., W. M. Hanemann, R. J. Kopp, J. A. Krosnick, R. C. Mitchell, S. Presser, P. A. Ruud, and V. K. Smith (1994a) "Prospective Interim Lost Use Value Due to DDT and PCB Contamination in the Southern California Bight," NOAA Contract No.-DGNC-1-00007.

Carson, R. T., L. Wilks, and D. Imber (1994b). Valuing the preservation of Australia's Kakadu Conservation Zone, Oxford Econom. Papers 46, 727-749.

Haab, T. and K. McConnell (1997). Referendum Models and Negative Willingness to Pay Alternative Solutions. Journal of Environmental Economics and Management 32(2), 251-270.

This module should be installed from within Stata by typing "ssc install turnbull". Windows users should not attempt to download these files with a web browser.

Turnbull; willingness to pay;

João Pedro Azevedo
jazevedo@worldbank.org
World Bank
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