The wage gap is smaller for female teachers in a union: Wage gap between female public school teachers and similar female workers, by union status, 1996–2015
| Year | Union | Non-union |
|---|---|---|
| 1996 | -4.8239% | -15.1142% |
| 1997 | -3.1197% | -16.1238% |
| 1998 | -4.6490% | -16.7834% |
| 1999 | -4.8905% | -18.0698% |
| 2000 | -7.6943% | -16.0569% |
| 2001 | -6.5381% | -19.8071% |
| 2002 | -7.8680% | -19.9737% |
| 2003 | -8.2807% | -17.7961% |
| 2004 | -8.2197% | -16.9125% |
| 2005 | -8.7760% | -19.8453% |
| 2006 | -8.3984% | -23.0571% |
| 2007 | -7.0411% | -18.4240% |
| 2008 | -8.8047% | -18.8815% |
| 2009 | -8.0873% | -17.0013% |
| 2010 | -6.7949% | -16.0536% |
| 2011 | -7.5807% | -18.8937% |
| 2012 | -6.5180% | -21.2190% |
| 2013 | -8.0988% | -22.0175% |
| 2014 | -10.3119% | -20.8320% |
| 2015 | -13.1726% | -22.3684% |
Note: Figure compares weekly wages. Regression-adjusted estimates include controls for age (quartic), education, race/ethnicity, geographical region, marital status, and gender for the pooled sample. Data are for workers age 18–64 with positive wages (excluding self-employed workers). Union representation is defined as being a union member or being covered by a union contract.
Source: Authors' analysis of Current Population Survey Outgoing Rotation Group data