CONTINGENCY TABLE ANALYSIS: Effect of Origins on Destination Probabilities
SEGMENTATION models divide workers into labor segments. Once the labor segments are defined, the most straightforward approach to examining intergenerational male mobility is to construct a mobility table by crossclassifying the labor segments of father and son. This chapter examines such a mobility table constructed from the OCG data. The labor segments are the widely used twelve major census occupations, which were originally conceived of as socioeconomic categories ( Edwards, 1934).
The correlation approach characterizes mobility with a single number. In contrast, the mobility table we will examine contains 144 cells. It seems clear, therefore, that the mobility table provides more information. Nevertheless, unless the information in the mobility table can be reduced to a smaller set of numbers, the correlation approach is likely to dominate due to its parsimony.
The percentage of sons in the same occupations as their fathers is a commonly used measure of immobility (for example, see U. S. Bureau of Census, 1964). This measure embodies a very narrow concept of what constitutes evidence that origins affect destinations. To emphasize the narrowness of this measure, the percentage of sons in the same occupation as their fathers shall be referred to as "strict occupational inheritance."
Rather than focus on the proportion of all sons who are in the same occupation as their fathers, we may examine strict occupational inheritance for each occupation. For which occupations are the chances of entry enhanced for persons whose fathers are in those occupations? Using the major