The welfare effects of crop biodiversity as an adaptation to climate shocks in Kenya

被引:42
作者
Bozzola, Martina [1 ,2 ,3 ]
Smale, Melinda [4 ]
机构
[1] Queens Univ Belfast, IGFS, Sch Biol Sci, Belfast, Antrim, North Ireland
[2] ZHAW Zurich Univ Appl Sci, Zurich, Switzerland
[3] Queens Univ, Belfast 19 Chlorine Gardens, Belfast BT9 5DL, Antrim, North Ireland
[4] Michigan State Univ, Dept Agr Food & Resource Econ, Justin S Morrill Hall Agr,446 West Circle Dr, E Lansing, MI 48824 USA
关键词
Crop diversification; Smallholder farmer; Vulnerability; Kenya; INSTRUMENTAL VARIABLES; ENVIRONMENTAL RISK; WEATHER; MANAGEMENT; DIVERSITY; VULNERABILITY; PRODUCTIVITY; AGRICULTURE; VARIABILITY; REGRESSION;
D O I
10.1016/j.worlddev.2020.105065
中图分类号
F0 [经济学]; F1 [世界各国经济概况、经济史、经济地理]; C [社会科学总论];
学科分类号
0201 ; 020105 ; 03 ; 0303 ;
摘要
This paper investigates the effects of crop biodiversity on farm income and production risk using a large panel dataset of rural households in Kenya. We consider three different metrics of in situ (on-farm) crop diversification (richness, evenness and concentration). We apply a partial moments-based model to test the effects of each strategy on welfare defined as expected crop income, variability (variance) and down-side risk (skewness). Our comprehensive econometric approach differentiates climatic shocks, weather and climate change. The results suggest that the benefits from greater diversification in terms of enhanced land productivity and lower production costs could surpass the foregone benefit from greater efficiency associated with more concentrated production systems. Crop richness and evenness each reduce exposure to crop income risk, especially for more vulnerable farmers who produce below the expected revenue threshold. Farmers who rely on greater crop specialization, on the contrary, are more exposed to crop income risk. (C) 2020 Elsevier Ltd. All rights reserved.
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页数:11
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