방법 비교

	Log-Linear Mobility Model	Intergenerational Elasticity
분야	Sociology	Sociology
계열	Regression model	Regression model
기원 연도	1970s	1992
창시자	Leo Goodman; Robert Hauser	Gary Solon (modern estimation)
유형	Log-linear / Poisson model for cell counts in mobility tables	Regression-based measure of intergenerational income persistence
원전	Hauser, R. M. (1978). A structural model of the mobility table. Social Forces, 56(3), 919–953.	Solon, G. (1992). Intergenerational income mobility in the United States. American Economic Review, 82(3), 393–408.
별칭	log-linear model for mobility, topological mobility model, quasi-independence model, levels model	IGE, intergenerational income elasticity, intergenerational income persistence, father-son income elasticity
관련	5	5
요약	Log-linear mobility models analyze an origin-by-destination mobility table by modeling the logarithm of its expected cell counts as a sum of terms: separate effects for the origin and destination marginals plus interaction terms that capture the origin–destination association. By specifying that association parametrically — through diagonal, level, or scaled terms — these models test precise hypotheses about the structure of social fluidity independent of the changing sizes of classes.	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.