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	Goodman Association Model	Intergenerational Elasticity
Field	Sociology	Sociology
Family	Regression model	Regression model
Year of origin	1979	1992
Originator	Leo A. Goodman	Gary Solon (modern estimation)
Type	Log-multiplicative model for association in ordered contingency tables	Regression-based measure of intergenerational income persistence
Seminal source	Goodman, L. A. (1979). Simple models for the analysis of association in cross-classifications having ordered categories. Journal of the American Statistical Association, 74(367), 537–552.	Solon, G. (1992). Intergenerational income mobility in the United States. American Economic Review, 82(3), 393–408.
Aliases	RC association model, row-column association model, log-multiplicative model, RC(M) model	IGE, intergenerational income elasticity, intergenerational income persistence, father-son income elasticity
Related	5	5
Summary	Goodman's association models, especially the row-column (RC) model, analyze the association in a two-way contingency table by representing it as a product of estimated scores for the row categories and scores for the column categories, scaled by an intrinsic association parameter. Introduced by Leo Goodman in 1979, they are log-multiplicative rather than purely log-linear, allowing ordered categories to be assigned data-driven scores and the strength of association to be summarized in a single, interpretable coefficient.	The intergenerational elasticity of income (IGE) is the workhorse measure of economic mobility: the regression coefficient from regressing a child's adult log income on the parent's log income. It expresses the percentage by which a child's expected income rises for each one-percent increase in parental income, so a higher IGE means income advantages and disadvantages are more strongly transmitted across generations and society is less mobile.