方法对比

	Agroecosystem Analysis	Rural Livelihood Diversification Index
领域	Food Agriculture Studies	Food Agriculture Studies
方法族	Process / pipeline	Process / pipeline
起源年份	1987	2000
提出者	Gordon R. Conway	Frank Ellis (rural livelihoods framework)
类型	Systems-diagnosis pipeline for agroecosystem performance	Descriptive concentration/diversity index pipeline for income sources
开创性文献	Conway, G. R. (1987). The properties of agroecosystems. Agricultural Systems, 24(2), 95-117.	Ellis, F. (2000). Rural Livelihoods and Diversity in Developing Countries. Oxford: Oxford University Press. ISBN: 9780198296966
别名	AEA, Agroecosystem Properties Analysis, Conway Agroecosystem Analysis, Agroecosystem Diagnosis	Livelihood Diversification Index, Income Diversification Index, Simpson Index of Income Diversification, Herfindahl Diversification Measure
相关	4	3
摘要	Agroecosystem analysis (AEA) is a systems-diagnosis framework, formalized by Gordon Conway in 1987, that characterizes any agricultural system through four properties: productivity, stability, sustainability, and equitability. Rather than judging a farming system by yield alone, AEA treats the agroecosystem as an ecological system shaped by human management and asks how much it produces, how reliably it produces it across seasons and shocks, whether it can maintain output over the long run, and how its benefits are distributed among the people who depend on it. The analyst bounds a system at an appropriate hierarchical level — plot, field, farm, watershed, or region — and uses interdisciplinary teams, ranked questions, and simple structured diagrams to surface the key relationships and the trade-offs among the four properties that drive design and policy choices.	A rural livelihood diversification index summarises, in a single number, how spread out a household's income is across different sources and activities — farming, off-farm wage labour, self-employment, remittances, transfers — rather than concentrated in one. Grounded in Frank Ellis's rural livelihoods framework, which defines diversification as the process by which rural households construct an increasingly diverse portfolio of activities to survive and improve their living standards, the index borrows concentration measures such as the Herfindahl and its Simpson complement from ecology and industrial economics. A household relying wholly on one crop scores as undiversified and exposed; one drawing evenly on many sources scores as highly diversified and, often, more resilient.