SUPPLY RESPONSE OF UPLAND RICE IN OGUN STATE OF NIGERIA: A PRODUCER PANEL APPROACH
利用农户面板数据，区分了四种供给反应指标，发现旱稻的自价格供给弹性显著为正，且小农对价格下降的反应不对称。
Several reasons have been proposed to explain the unexpectedly low supply elasticities often found for food crops. This study is unusual in using a farmers' panel approach. This enables a distinction to be made between four different measures of response: realised output, planted hectarage, planned hectarage and ‘hypothetical’ hectarage. The results indicate that the own‐price elasticities of supply are significantly positive. Planned, planted and realised responses are quite close, but are less than the hypothetical responses. The hypothetical elasticities are smaller for price falls than for price increases and they become lower as the harvesting period passes, suggesting contraction of supply of a crop when its price falls and asymmetric response among small‐scale farmers.