期刊
FOOD POLICY
卷 70, 期 -, 页码 50-61出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.foodpol.2017.05.001
关键词
Yield; Wheat; Variability; Risk; Weather; Common Agricultural Policy
Increases in cereals production risk are commonly related to increases in weather risk. We analyze weather-induced changes in wheat yield volatility as a systemic weather risk in Germany. We disentangle, however, the relative impacts of inputs and weather on regional yield volatility. For this purpose we augment a production function with phenologically aggregated weather variables. Increasing volatility can be traced back to weather changes only in some regions. On average, inputs explain 49% of the total actual wheat yield volatility, while weather explains 43%. Models with only weather variables deliver biased but reasonable approximations for climate impact research. (c) 2017 Elsevier Ltd. All rights reserved.
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