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Table 2 The proportion of PV (protest vote responses) and DK (“don’t know”- responses)

From: Multi-country willingness to pay study on road-traffic environmental health effects: are people willing and able to provide a number?

 

Air pollution: % of respondents

Noise: % of respondents

PV

8.6

10.9

DK for general WTP

48.0

47.4

DK for specific effects

55.7

53.8

DK for scenario of combined effects

53.8

51.4

  1. Respondents were asked how much they were willing to pay in general, for specific air pollution or noise effects, and for a scenario of combined effects.