MODELS FOR COMPARING MOBILITY TABLES: TOWARD PARSIMONY AND SUBSTANCE.

This paper introduces new models for comparing several social mobility tables that provide various one-degree-of-freedom tests for two mobility tables on substantively meaningful structural components. These components include differences between mobility tables in (1) the strength of off-diagonal associations, (2) the strength of diagonal effects, and (3) the extent of structural mobility. Most of the models in this paper use association models and the Sobel-Hout-Duncan model but are specifically formulated to analyze three-way tables that have either nations or periods as the third dimension. American, British, and Japanese mobility tables are compared. Together, they show that equality of occupational opportunity is larger for the United States than for Great Britain, that Japan's mobility structure is closer to quasi-independence than that of the two other nations, and that Japan's mobility structure became more like that of the United States in 1975 rather than in 1955. These analyses also demonstrate that comparative mobility research based on indexing mobility has strong limitations. [ABSTRACT FROM AUTHOR]