手法を比較

	Structural Decomposition Analysis	Input-Output Multiplier Analysis
分野	経済学	経済学
系統	Process / pipeline	Process / pipeline
提唱年	1998	1936
提唱者	Rose & Casler; Dietzenbacher & Los (decomposition formalization)	Wassily Leontief (multiplier formalization by Miller & Blair)
種類	Comparative-static decomposition of input-output change into structural determinants	Linear impact-multiplier model derived from the Leontief inverse
原典	Dietzenbacher, E., & Los, B. (1998). Structural decomposition techniques: sense and sensitivity. Economic Systems Research, 10(4), 307–324.	Miller, R. E., & Blair, P. D. (2009). Input-Output Analysis: Foundations and Extensions (2nd ed.). Cambridge University Press. ISBN: 9780521739023
別名	SDA, Input-Output Structural Decomposition, IO Structural Decomposition Analysis, Additive Structural Decomposition	I-O Multipliers, Leontief Multipliers, Type I and Type II Multipliers, Output Multipliers
関連	4	4
概要	Structural decomposition analysis (SDA) explains how an input-output quantity — total output, value added, energy use, or emissions — changed between two periods by attributing the change to its underlying structural determinants, chiefly shifts in production technology (the Leontief inverse) versus shifts in the level and composition of final demand. Built on comparative statics over two or more comparable tables, SDA expresses the difference as a sum of effects and resolves the indeterminacy of multiplicative terms by averaging the two polar decomposition forms, the convention standardized by Dietzenbacher and Los.	Input-output multiplier analysis converts the Leontief inverse into summary impact coefficients that answer how much total output, household income, or employment an economy generates per unit of final demand directed at a given sector. Building directly on Leontief's inter-industry accounting, it distinguishes the initial direct effect from the indirect supply-chain effect and, in the Type II form, the induced effect of household re-spending, yielding the multipliers that underpin most regional and project economic-impact studies.