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	Corporatism Index	Power Resources Analysis
Field	Political Economy	Political Economy
Family	Process / pipeline	Process / pipeline
Year of origin	1999	1983
Originator	Alan Siaroff & Lane Kenworthy	Walter Korpi & Gosta Esping-Andersen
Type	Composite institutional index	Comparative political economy theory
Seminal source	Siaroff, A. (1999). Corporatism in 24 Industrial Democracies: Meaning and Measurement. European Journal of Political Research, 36(2), 175-205.	Korpi, W. (1983). The Democratic Class Struggle. Routledge & Kegan Paul. ISBN: 9780710094490
Aliases	Corporatism Score, Wage Coordination Index, Bargaining Centralization Index, Siaroff Corporatism Index	Power Resources Theory, Power Resource Approach, Class Mobilization Theory, Korpi Power Resources Model
Related	3	4
Summary	A corporatism index is a quantitative scaling of how centralized and coordinated a country's system of wage bargaining and interest intermediation is. Where the conceptual corporatism framework describes the institutional pattern in which peak associations of labor and capital negotiate with the state, a corporatism index turns that pattern into comparable numbers. The two landmark efforts are Alan Siaroff's 1999 integrated scale for 24 industrial democracies and Lane Kenworthy's 2003 systematic review and reconstruction of the available indicators. Both combine measures such as bargaining centralization, wage-setting coordination, union and employer organizational concentration, and the degree of tripartite concertation into a composite score that ranks countries from pluralist and decentralized at the low end to strongly corporatist and coordinated at the high end.	Power resources analysis is a comparative political-economy framework, developed above all by Walter Korpi in The Democratic Class Struggle (1983) and extended by Gosta Esping-Andersen in The Three Worlds of Welfare Capitalism (1990), that explains the size and shape of welfare states by the distribution of power resources between social classes. Its central claim is that under democratic capitalism the working class can offset capital's structural advantage in markets by mobilizing political power resources — above all the organizational strength of trade unions and the governing strength of left and labor parties. Where labor is strongly organized and durably in government, it builds class coalitions that translate that power into generous, redistributive social policy and a high degree of decommodification: the extent to which citizens can maintain a livelihood without depending on the market.