Land Allocation in HYV Adoption Models: An Investigation of Alternative Explanations
检验了四种解释农民在高产品种采纳中部分土地分配行为的理论，发现它们共同解释马拉维小农户的行为，但单独检验时各自显著，提示单一解释可能导致狭隘结论。
Abstract Microeconomic theory provides four competing explanations for partial land allocation to new and traditional seed varieties in HYV adoption decisions: input fixity, portfolio selection, safety‐first behavior, and learning. Testing a general model that contains each as a special case suggests that they are jointly most likely to explain land allocation in the HYV adoption decisions of Malawian smallholders. Yet when each explanation is tested to the exclusion of the others (as is usually the case in the literature), competing hypotheses are individually significant. Results suggest that employing approaches based on single explanations may lead to inappropriately narrow conclusions.