Unit Non-Response Bias in the Interval Data Model
研究通过多边界概率选择模型修正调查中的无应答和自选择偏差，发现修正后的支付意愿估计值显著高于未修正值，对政策研究有参考价值。
<i>A mail survey was administered to a panel of Colorado consumers to obtain estimates of willingness to pay (WTP) for preserving Union Park. Detailed socioeconomic data for all surveyed individuals was available a priori. We develop and employ the multiple-bounded probit with selection (MBPS) model, to correct for non-response and self-selection bias. Statistical tests indicate estimates of WTP corrected for these biases are significantly higher than uncorrected estimates. The use of selection models requires an additional investment by researchers. These investments may be warranted for policy relevant studies.</i>