Eric Larsen provides some nice quantitative analysis about why so many teachers earn master’s degrees in “Teacher MA attainment rates, 1970-2000.” First the fact: the fraction of teachers with a master’s more than doubled between 1970 and 2000, the numbers going from 21 to 45 percent. Larsen builds a statistical model that breaks this down into four causes.
- 10 percentage points–increases in the MA salary premium.
- 6 percentage points–increased age of the teacher corps.
- 1 percentage point–all other observable factors
- 7 percentage points–remaining unknown factors.
In other words, the big reason teachers earn master’s is the money.