Sample nonresponse and selection biases that may occur in survey research such as contingent valuation applications are discussed and tested. Correction mechanisms for these types of biases are demonstrated. Results indicate the importance of testing and correcting for unit and item nonresponse...

Concerns about the accuracy of benefit transfer approaches remain a barrier to using low-cost benefit estimation techniques for policy decisions, or even as a rapid-assessment tool used for simulations or communication. In this paper, we present and discuss the process of generating benefit...