Education Secretary Arne Duncan thinks public-school teachers are “desperately underpaid†and has called for doubling teacher salaries. In a new paper co-authored with Jason Richwine of the Heritage Foundation, I look into whether teachers really are desperately underpaid, or underpaid at all. Jason and I find that the conventional wisdom is far off the truth.At first glance, public-school teachers definitely look underpaid. According to Census data, teachers receive salaries around 20 percent lower than similarly educated private-sector workers. The Bureau of Labor Statistics says teachers’ benefits are about the same as benefits in the private sector. But both the salary...