Suppose you want to test whether the 1993 FMLA actually affected the wages of female workers. Assume you have data on the wages, gender, firm size, and other characteristics (age, education, race, ethnicity, etc.) of workers for the years 1990 to 1997. Describe a research design that would allow you to estimate the law’s impact. Be sure to define your treatment and control groups and describe how you would estimate the effect. Suppose that women and men are substitutable in most jobs regardless of a firm’s size. How does this affect, if at all, the validity of your control group(s) and the interpretation of your findings? (Think about what can happen as a result of an adjusting labor market equilibrium.)