Using telephone and Internet (web-based) survey samples for a national advisory referendum, this study investigates whether the underlying preferences across two survey modes are equivalent. Results from a structural test support the conclusion of common preferences.

A seemingly unrelated Poisson regression model is proposed as an alternative to single equation Poisson models for joint estimation of revealed preference (RP) and contingent behaviour (CB) trip demand. Findings indicate that RP and CB data should be estimated jointly.

The Environmental Kuznets Curve (EKC) hypothesis is investigated for US hazardous waste sites. Where past studies have typically focused on cross-country analyses of conventional air and water pollutants, here, US county level data and assessed risk is used as the measure of environmental...