手法を比較

	Rural Livelihood Diversification Index	Agrifood Value Chain Analysis
分野	Food Agriculture Studies	Food Agriculture Studies
系統	Process / pipeline	Process / pipeline
提唱年	2000	2001
提唱者	Frank Ellis (rural livelihoods framework)	Raphael Kaplinsky & Mike Morris
種類	Descriptive concentration/diversity index pipeline for income sources	Field-based value-chain mapping and analysis pipeline
原典	Ellis, F. (2000). Rural Livelihoods and Diversity in Developing Countries. Oxford: Oxford University Press. ISBN: 9780198296966	Kaplinsky, R., & Morris, M. (2001). A Handbook for Value Chain Research. Prepared for the International Development Research Centre (IDRC). Brighton: Institute of Development Studies, University of Sussex.
別名	Livelihood Diversification Index, Income Diversification Index, Simpson Index of Income Diversification, Herfindahl Diversification Measure	Agricultural Value Chain Analysis, Food Value Chain Mapping, Commodity Chain Analysis (Agrifood), Value Chain Governance Analysis
関連	3	3
概要	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.	Agrifood value chain analysis traces a food product through the full sequence of value-adding activities — from input supply and farming through processing, trade, and retail to the final consumer — and asks how value, costs, and power are distributed along that chain and where smallholders and processors can capture more. The method follows Kaplinsky and Morris's influential Handbook for Value Chain Research, which provides the practical apparatus for mapping a chain, quantifying flows and margins, and analysing governance and upgrading. Gereffi, Humphrey, and Sturgeon's theory of global value chain governance supplies the lens for understanding who coordinates the chain and how that coordination shapes the prospects for upgrading.