השוואת שיטות

	Ghosh Supply-Driven Model	Environmentally Extended Input-Output Analysis
תחום	כלכלה	כלכלה
משפחה	Process / pipeline	Process / pipeline
שנת המקור	1958	1970
הוגה השיטה	Ambica Ghosh	Wassily Leontief
סוג	Supply-driven linear inter-industry model using allocation coefficients	Input-output model augmented with environmental satellite accounts
מקור מכונן	Ghosh, A. (1958). Input-output approach in an allocation system. Economica, 25(97), 58–64.	Leontief, W. (1970). Environmental repercussions and the economic structure: an input-output approach. The Review of Economics and Statistics, 52(3), 262–271.
כינויים	Ghosh Model, Supply-Side Input-Output Model, Allocation Coefficient Model, Output-Side I-O Model	EEIO, Environmental Input-Output Analysis, Pollution Input-Output Model, Footprint Input-Output Analysis
קשורות	4	4
תקציר	The Ghosh model is the supply-side counterpart to the Leontief demand-driven input-output system, introduced by Ambica Ghosh in 1958. Rather than fixing the recipe of inputs per unit of output, it fixes allocation coefficients — the share of each sector's output sold to every downstream buyer — and asks how a change in the supply of primary inputs (value added) propagates forward to total output. Solving x' = x'B + w' gives x' = w'(I − B)^{-1}, where the Ghosh inverse G = (I − B)^{-1} plays the forward-looking role that the Leontief inverse plays for demand.	Environmentally extended input-output (EEIO) analysis appends satellite accounts of physical environmental flows — greenhouse-gas emissions, energy, water, land, and materials — to a monetary input-output table so that environmental burdens can be allocated through supply chains to the final demand that ultimately drives them. By multiplying direct environmental-intensity coefficients by the Leontief inverse, EEIO computes the total burden embodied in each unit of final demand, providing the standard framework for consumption-based carbon footprints and emissions embodied in trade.