Regression results

(1) (2) (3) (4)
Public sector coverage (ln) Public sector coverage (ln) Public sector coverage (ln) Public sector coverage (ln)
Favorable state dummy (Freeman) 0.547*** 0.261**
(0.155) (0.129)
Unfavorable state dummy (Freeman) -0.410** -0.269**
(0.161) (0.115)
Favorable state dummy (Update) 0.165 -0.0751
(0.137) (0.097)
Unfavorable state dummy (Update) -0.735*** -0.431***
(0.136) (0.098)
Private sector coverage (ln) 0.423*** 0.456***
(0.079) (0.083)
RTW dummy -0.275*** -0.375***
(0.099) (0.101)
Constant 3.279*** 2.774*** 3.659*** 3.016***
(0.142) (0.225) (0.109) (0.193)
Observations 50 50 50 50
R-squared 0.678 0.854 0.584 0.829

Note: OLS regression of public sector union coverage rates on dummy variables for whether the state has public sector laws that were either “Favorable” or “Unfavorable.” Omitted category is “Intermediate.” Some models control for private sector union coverage rates and for whether the state has a RTW law. Union coverage rates are in ln form.  Standard errors in parentheses. ***p<.01, **p<.05, *p<.01.

Source: Authors’ analysis of Current Population Survey Outgoing Rotation Group microdata, 12 months ending April 2017.

View the underlying data on epi.org.