The optimal drought index for designing weather index insurance
研究了基于降水、土壤湿度和蒸散发的干旱指数在天气指数保险中的风险降低效果，发现针对每个农场定制的指数效果最好。
Abstract Climate change increases the need for better insurance solutions that enable farmers to cope with drought risks. We design weather index insurance using drought indices based on precipitation, soil moisture and evapotranspiration as underlying drought index and compare their risk-reducing potential for winter wheat producers in Eastern Germany. In general, we find that all drought indices can reduce financial risk exposure. However, the largest risk reduction can be achieved if the underlying drought index is tailored individually for each farm. This implies that insurers should offer insurance with farm-specific underlying drought index.