Add a race-gender cross graphic.
Whitespace, commment in and out, and choosing model changes.
Adjust sampling for out-of-sample data in 10GM.
Avoid `%.%` operator before updating to dplyr that uses `%>%`
Calculate mobility in 10
Simplify credits count.
Chnage 10GM model used.
Added missing year to person_annual. Whoops.
Middle school models for promotion.
Add presentation to R&P.