Fig. 1From: Impact of environmental and social attitudes, and family concerns on willingness to pay for improved air quality: a contingent valuation application in Mexico CityWTP (2008 US$) for improved air quality by environmental and social attitudes, and family concerns. Baseline refers to a respondent with a full-time job, between 45 and 55 years of age, with household income between US $967 and US $2167 to which he/she contributes more than 75%Back to article page