Choice of Rice Production Practices in Ghana: A Comparison of Willingness to Pay and Preference Space Estimates
研究通过离散选择实验比较了两种估计方法（支付意愿空间与偏好空间）在加纳农户水稻生产实践偏好上的表现，发现支付意愿空间模型拟合更好且估计更合理。
Abstract Rice has been identified as an important food security crop in Ghana. However, there is a production deficit and new technologies to reduce the deficit are not widely adopted. Although poor adoption by farmers’ is often linked to constraints such as access to information, farmers’ perceptions of the technologies are also important. We apply an advanced discrete choice experiment to evaluate farmers’ preferences for rice production practices. Specifically, we generate willingness to pay ( WTP ) estimates using willingness to pay space ( WS ) and compare these with values from the indirect or preference space ( PS ) method. Our modelling also accounts for the effects on WTP estimates of farmers’ stated attribute importance ( SAI ) information. Empirical results from WS and PS models reveal that on average, farmers value higher yields and are negatively affected by higher risk of crop failure and labour requirements. Comparing the performance of the two models, we find the WS model provides a superior fit to our data and reduces the likelihood of producing implausible WTP estimates. Further, SAI inclusion did not produce much variation in our WTP estimates.