ΔOff-Base
	(1) β
MTF Hospital to No MTF Hospital	0.673*** (0.019)
No MTF Hospital to MTF Hospital	−0.636*** (0.013)
F-Statistic	556.989
p-value	0.171
Outcome Mean	0.013
R2	0.441
N	95,773

Notes: Column 1 shows coefficients from an OLS regression where the outcome is the change in off-base status from the previous to the current birth. The p-value is for an F-test where the null hypothesis is that the two instruments are opposite and equal. The model includes controls for calendar year, age group, sponsor’s pay grade and occupation, and sponsor’s race. Standard errors are clustered at the base level.