Ladder Rank Salary Data
Multiple Linear Regression Analysis
When these data are evaluated with the simplest model that includes only demographic variables the result indicate that women earn salaries that are 11.4% lower, compared to their colleagues who are male and URM faculty earn 8% less than white faculty, but only 4% of the salary variation is explained by the model (Table 1). As additional explanatory variables are added to the model, salary differences diminish to less than 2% between women, Asian, and URMs when compared to white men; and the percentage of salary variation explained by the model increases to 91% (Table 1). This indicates that at the campus level, there is little evidence of salary inequity associated with gender and/or ethnicity.
Rank and Step Distribution Analysis
When controlling for rank and step, regression analyses show salaries are similar by demographic variables at the time of hire as well. The distribution of faculty among ranks both currently and at time of hire is displayed in Table 2 and Table 3. The tables, along with graphs of the data, reveal women and minorities predominately begin in the lower ranks while the ranks in which white men begin is more evenly dispersed. The current rank for white men is also normally distributed while the distribution for others are skewed to the right.
The progression data for all General Campus Ladder Rank Faculty, are plotted below. Normative progression is defined in the Progression Matrix.
Progress Rate Analysis
Using a simple t-test, the results indicate that there is no statistically significant difference in progression rate means by ethnicity when compared to white male faculty. However, women on average advanced at a rate that was 0.62 years slower than White men. After using multivariate regression to adjust for experience, discipline, and initial rank, there was no statistically significant difference in rates of progression between White men, women, URM, or Asian faculty. Normative progression is defined in the Progression Matrix.
Analyses at the school level yield a range of results. When controlling for experience, department within the school, and rank, salary differences are, for the most part, similar to that of the campus as a whole, but there are exceptions. Some units show statistically significant lower salaries for women and minority groups while the opposite holds true in other units. Known limitations to the current analysis are that data on “Stop the Clock” was not readily available nor was there enough data to consistently address the impact of outside offers.
General Campus Summary
In summary, we found no evidence for systemic inequity in salary associated with gender and/or ethnicity among faculty at the campus level. However this study does highlight several areas for further evaluation including understanding factors contributing to low representation of women and minority faculty in the higher ranks and steps. Progression rates through the ranks should also be further examined. Although, overall progression rates are similar for all faculty, there were outliers and evidence to suggest that groups of faculty in specific academic units may benefit from intervention to help them progress through the ranks and steps.