مقایسهٔ روش‌ها

	Social Accounting Matrix	Input-Output Analysis
حوزه	اقتصاد	اقتصاد
خانواده	Process / pipeline	Process / pipeline
سال پیدایش	1962	1936
پدیدآور	Richard Stone; popularized by Graham Pyatt & Jeffery Round	Wassily Leontief
نوع	Comprehensive, square, double-entry accounting framework	Linear inter-industry accounting and impact model
منبع بنیادین	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.
نام‌های دیگر	SAM, Social Accounting Framework, SAM Multiplier Model	Leontief Model, Inter-Industry Analysis, I-O Analysis, Input-Output Model
مرتبط	3	4
خلاصه	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.