Although time use has received much attention by social scientists as an index of resource allocation and social relations across groups, only a few studies have carefully assessed the relative strengths and weaknesses of the existing methods of measuring time use: time diary (TD), stylized (S) respondent report, and experiential sampling method (ESM). We note the varying degree of biases that arise in part from the extent of detail in the information collected by the three methods. Using findings from our analysis of the structure of these methods, we hypothesize that there are empirical exceptions to previously reported common findings that TD provides less biased information on time use than does S-namely (a) when labor market workers report their time spent on labor market work, and (b) when the historical trend in time, rather than the absolute level, is studied. Empirical results confirm our prediction and show that, among individuals who work

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Proponents of the theory of specialization and exchange hypothesize that in any national context, women's higher economic standing will decrease their chance of marriage. Some researchers suggest, however, that only in industrialized countries with a high degree of role differentiation by gender does the inverse relationship between women's economic standing and the chance of marriage exist. To evaluate contrasting cross-national predictions, I test with longitudinal data and standardized methods whether the inverse relationship exists in 3 similarly affluent industrialized countries that vary in their degree of role differentiation by gender: the United States, Japan (a context more differentiated by gender than the United States), and Sweden (a context less differentiated by gender than the United States). Contrary to the prediction that develops out of the theory of specialization and exchange, results indicate that women's higher levels of income discourage first marriage formation in Japan, but encourage it in the United States and Sweden.Does the expanding economic role of women weaken the institution of marriage in all contexts or only in contexts where men's and women's roles are highly differentiated? Although this is-Institute for Social Research, 426 Thompson Street, University of Michigan, Ann Arbor, MI 48106 (hono@isr. umich.edu).

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