Tanya O’Garra; Mourato, Susana - In: Environmental & Resource Economics 36 (2007) 4, pp. 389-411
We use a quantile regression (QR) approach to analyse contingent valuation estimates of public willingness to pay (WTP) for the air and noise pollution reductions associated with the introduction of hydrogen buses in London. QR results show that variables that were not significant in interval...