13.19. Table 13.17 shows results of fitting a regression model to data on salaries (in dollars) of about 35,000 college professors. Four predictors are categorical (binary), with dummy variable defined in parentheses. Write a short report, interpreting the effects of the predictors.

TABLE 13.17 Variable Estimate (Std. Error)

Years of experience 162.7 (2.0)

Terminal degree 264.0 (40.1)

(Ph.D. = 1)

Degree quality 616.8 (34.5)

Research productivity 616.5 (7.7)

Marital status 850.3 (51.2)

(married = 1)

Race -310.3(107.0)

(nonwhite - 1)

Gender -1863.7 (62.1)

(female - 1)

Intercept 10.033.2 Source: N. Langlon and J. Pfeffer,American Sociological Review, vol. 59,1994, p. 236.