Table 4.

T-test on the effect of starting hiring restrictions in establishments with a collective bargaining agreement according to the estimates in Table 3

	(a) Restrictions in hiring workers	(b) Restrictions in hiring skilled workers
Started hiring restrictions in establishments in collective bargaining agreement	−0.007 (0.007)	−0.009 (0.007)

Source: IAB Establishment Panel 2008–2018.

Note: Test of joint significance of estimates of the variables “starting restrictions” and the interaction variable “maintaining of a collective bargaining agreement”• “starting restrictions”