قارن الطرق

	Location Quotient	Input-Output Analysis	Shift-Share Analysis
المجال	الاقتصاد	الاقتصاد	الاقتصاد
العائلة	Process / pipeline	Process / pipeline	Process / pipeline
سنة النشأة	1960	1936	1960
صاحب الطريقة	Developed in regional science; codified by Walter Isard	Wassily Leontief	Edgar S. Dunn (Daniel Creamer credited with early use)
النوع	Descriptive index of relative regional concentration	Linear inter-industry accounting and impact model	Descriptive decomposition of regional growth
المصدر التأسيسي	Isard, W. (1960). Methods of Regional Analysis: An Introduction to Regional Science. Cambridge, MA: MIT Press. ISBN: 9780262090032	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.	Dunn, E. S. (1960). A statistical and analytical technique for regional analysis. Papers of the Regional Science Association, 6(1), 97–112.
الأسماء البديلة	LQ, Coefficient of Localization, Regional Specialization Ratio	Leontief Model, Inter-Industry Analysis, I-O Analysis, Input-Output Model	Shift-Share Decomposition, SSA, Esteban-Marquillas Shift-Share, Regional Shift-Share
ذات صلة	3	4	3
الملخص	The location quotient (LQ) is a simple descriptive index that measures how concentrated an industry is in a region relative to a larger reference area, usually the nation. It is the ratio of the industry's share of local employment (or output) to its share of national employment. An LQ above one means the region is more specialized in that industry than the nation as a whole; an LQ below one means it is under-represented.	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.	Shift-share analysis is a descriptive technique that decomposes the change in a regional variable — most often sectoral employment — into three additive components: the part attributable to overall national growth, the part attributable to the region's industry mix, and the part attributable to the region's own competitive performance. Formalized by Edgar Dunn in 1960, it answers whether a region grew because the national economy grew, because it specializes in fast-growing industries, or because its industries outperformed (or underperformed) their national counterparts.