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Table 7 Instrumental variables panel estimates with interaction variables – the influence of specific working time accounts on productivity and wages per employee

From: Working time accounts and firm performance in Germany

  log(PROD) log(WpE)
  RE FE RE FE
WTA 1.689*** (0.332) 2.809 (2.793) 1.472*** (0.392) 1.064 (1.363)
WTA*CP < = 1Y −0.580*** (0.124) −0.605 (0.630) −0.367*** (0.098) −0.262 (0.327)
WTA 1.141*** (0.203) 2.327 (2.050) 0.646*** (0.146) 0.246 (0.169)
WTA*CP > 1Y −0.347*** (0.071) −0.455 (0.396) −0.139*** (0.028) −0.060* (0.032)
WTA 1.244*** (0.223) 2.164 (1.807) 0.703*** (0.170) 0.263 (0.197)
WTA*noFCP −0.305*** (0.065) −0.350 (0.275) −0.088*** (0.025) −0.024 (0.028)
  1. Notes: Basic control variables are the same as those in Tables 2 and 3. Additionally, interaction variables between WTA and the following variables are incorporated: CP < =1Y (=1 if compensation period within a year), CP > 1Y (=1 if compensation period is more than 1 year), noFCP (=1 if no fixed compensation period is agreed) are dummies. The WTA variable is instrumented as in Table 3; *p < 0.1, ***p < 0.01