手法を比較

	Social Accounting Matrix	Input-Output Analysis
分野	経済学	経済学
系統	Process / pipeline	Process / pipeline
提唱年	1962	1936
提唱者	Richard Stone; popularized by Graham Pyatt & Jeffery Round	Wassily Leontief
種類	Comprehensive, square, double-entry accounting framework	Linear inter-industry accounting and impact model
原典	Pyatt, G., & Round, J. I. (Eds.). (1985). Social Accounting Matrices: A Basis for Planning. Washington, DC: The World Bank. ISBN: 9780821305508	Leontief, W. W. (1936). Quantitative input and output relations in the economic system of the United States. The Review of Economics and Statistics, 18(3), 105–125.
別名	SAM, Social Accounting Framework, SAM Multiplier Model	Leontief Model, Inter-Industry Analysis, I-O Analysis, Input-Output Model
関連	3	4
概要	A social accounting matrix (SAM) is a square, double-entry table that records all transactions among the production sectors, factors of production, institutions (households, firms, government), and the rest of the world in an economy for a given year. It extends the input-output table by closing the circular flow of income — connecting how value added becomes factor income, factor income becomes household income, and household income becomes demand — so that every account's receipts (its row) exactly equal its expenditures (its column).	Input-output analysis is a quantitative framework for representing the interdependence between the industries of an economy, introduced by Wassily Leontief in 1936. It records the flows of goods and services between sectors in a transactions table, derives fixed technical coefficients describing how much each industry buys from every other industry per unit of output, and inverts the resulting linear system to trace how an exogenous change in final demand ripples through the entire production structure.