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Table 1 Percentage of no-responses by bid

From: Impact of environmental and social attitudes, and family concerns on willingness to pay for improved air quality: a contingent valuation application in Mexico City

  Bids in 2008 US dollarsa
7.5 12.5 25 37.5 50 57.5 62.5 75 87.5
Respondents 180 165 145 146 192 175 188 179 171
%no-responses 10.5 4.9 0.0 15.0 15.7 20.0 17.6 23.5 31.6
  1. aBids are randomly assigned to respondents