. The use of onsite sampling usually reflects data or budgetary constraints but can lead to two primary forms of bias in … site choice models. First, the strategy entails sampling site choices rather than sampling anglers – a form of bias called … population – the most common form in recreation demand is avidity bias. We propose addressing these biases by combining two …

-generation process, the least-squares estimators have smaller bias (in fact zero bias) but larger variances in the long regression than … in the short regression. But if the long regression is also misspecified, the bias may not be smaller. We provide bias …