U.S. Women's Labor-Force Participation
Mroz data frame has 753 rows and 8 columns.
The observations, from the Panel Study of Income Dynamics (PSID),
are married women.
Mroz, T. A. (1987) The sensitivity of an empirical model of married women's hours of work to economic and statistical assumptions. Econometrica 55, 765--799.
Fox, J. (2000) Multiple and Generalized Nonparametric Regression. Sage. Long. J. S. (1997) Regression Models for Categorical and Limited Dependent Variables. Sage.