台灣不同稻作保險方案之經濟分析－－以雲林縣稻作生產區為例

An Economic Analysis of Alternative Rice Insurance Policies in Taiwan

本研究利用羃次效用函數以及期望效用模型，分析在分別採行收益、價格和產量三種不賺不賠的稻米保險方案以及不同的差額理賠比例下，稻農每公頃淨收益確定等值的變化。本研究發現一期蓬萊稻作以100%差額理賠的收益保險效果最好，可提升稻農淨收益確定等值8,661 元或30%，產量保險最低僅可提升1,489 元；二期蓬萊稻作以100%差額理賠的產量保險效果最好，可提升稻農收益確定等值1,123元或4.7%，而價格保險反而會降低稻農淨收益確定等值。

This paper applies power utility function and the direct expected utility maximization model to analyze the changes of net income certainty equivalent of rice production per hectare under different rice insurance policies. In particular, gross revenue insurance, price insurance and yield insurance with actuarially sound premiums combined with 100% or 80% coverage are examined. We found, in the first crop of rice, that the gross revenue insurance with actuarially sound premiums and 100% coverage achieved the best results. It raised farmers’ net income certainty equivalent by NT$ 8,661(or 30%) per hectare. On the other hand, the yield insurance raised the least certainty equivalent. It only resulted in an increase of NT$ 1,489 per hectare. In the second crop of rice, the yield insurance with actuarially sound premiums and 100% coverage achieved the best results, but it only increased the certainly equivalent by NT$1,123 of per hectare. On the contrary, the price insurance resulted in a reduction of the farmers’ net income certainty equivalent.