January 2000 - People in Sofia are willing to pay 4.2 percent of their income or more for a program to improve air quality. Through a survey, Wang and Whittington study willingness to pay for improvements in air quality in Sofia, Bulgaria. Using a stochastic payment card approach - asking...

"In determining domestic water prices, policy makers often need to use information about the demand side rather than only relying on information about the supply side. Household surveys have frequently been employed to collect demand-side information. This paper presents a multiple bounded...