Teachers in a union have a smaller wage gap: Wage gap between public school teachers and similar workers, by union status, 1996–2015
| Year | Union | Non-union |
|---|---|---|
| 1996 | -10.89% | -18.51% |
| 1997 | -11.42% | -19.57% |
| 1998 | -12.05% | -22.91% |
| 1999 | -13.37% | -22.51% |
| 2000 | -14.25% | -21.03% |
| 2001 | -13.86% | -24.52% |
| 2002 | -16.39% | -24.01% |
| 2003 | -15.75% | -23.19% |
| 2004 | -16.72% | -20.37% |
| 2005 | -17.63% | -23.70% |
| 2006 | -17.60% | -25.81% |
| 2007 | -16.30% | -22.89% |
| 2008 | -17.01% | -22.96% |
| 2009 | -16.38% | -21.11% |
| 2010 | -16.21% | -21.23% |
| 2011 | -16.76% | -22.22% |
| 2012 | -16.45% | -24.12% |
| 2013 | -17.39% | -24.33% |
| 2014 | -18.28% | -24.05% |
| 2015 | -19.56% | -25.47% |
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