Table 3

Effects of outsourcing participation on TFP

VariablesOLS (1)FE (2)FE, Driscoll Kraay (3)
Dummy_outsourcing−0.023**0.0160.022***
(0.010)(0.011)(0.004)
Firm age−0.0010.001***0.001*
(0.001)(0.001)(0.001)
Firm size−0.0010.012***−0.008***
(0.001)(0.004)(0.003)
Capital structure0.041***0.034***0.029***
(0.0110)(0.013)(0.010)
Dummy_innovation0.021***0.006−0.009***
(0.005)(0.006)(0.002)
Constant1.422***1.233***1.409***
(0.020)(0.049)(0.057)
Year dummiesNNY
Industry dummiesNNY
Observations12,93912,93912,939
R-squared0.0030.005 
Number of groups4,5494,5494,549

Note(s): (1) Robust t-statistics in parentheses; (2)*p < 0.1; **p < 0.05; ***p < 0.01

For definitions of the variables, please refer to Table 1 

Source(s): Authors’ calculations from STATA software

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