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Table 2 Socioeconomic characteristics in sample and populations (n = 1541)

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

  Mean Std. Dev DGAMa t test
(A)   (B) (B–A)
Male 0.48 0.49 0.48 0.00
Age 39.01 14.44 38.50 1.38
Household members 3.77 1.59 3.70 1.72
Unemployed 0.66 0.78 0.54 6.03
Retired 0.12 0.32 0.12 0.00
Car at household 0.74 0.44 0.76 1.78
Sick household member 0.33 0.47
  1. aSources: CEFP (2009), INEGI (2010), INEGI (2016)