Table 5

Digital economy and regulatory quality

OLSFS (1)2SLS (1)FS (2)2SLS (2)FS (3)2SLS (3)
LIT 0.0115   0.0124 
 [0.0015]***   [0.0015]*** 
INST   −0.0232 −0.0307 
   [0.0056]*** [0.0047]*** 
REG0.091 0.112 0.515 0.186
[0.042]** [0.107] [0.212]** [0.102]*
ln(GDPC)0.013 0.013 0.020 0.016
[0.007]* [0.006]** [0.007]*** [0.006]***
ln(FD)−0.026 −0.030 −0.098 −0.029
[0.028] [0.028] [0.054]* [0.029]
ln(EXP)−0.003 −0.005 −0.031 −0.014
[0.008] [0.010] [0.015]** [0.009]
ln(GINI)0.035 0.039 0.130 0.091
[0.080] [0.087] [0.083] [0.081]
GRAD−0.018 −0.019 −0.030 −0.018
[0.005]*** [0.005]*** [0.008]*** [0.005]***
POP0.007 0.008 0.019 0.012
[0.004]* [0.005] [0.005]*** [0.005]***
ln(INC)0.024 0.026 0.053 0.029
[0.009]*** [0.007]*** [0.016]*** [0.008]***
Adj-R20.907 0.865 0.789 0.876
F-test (FS)– 56.34 17.14 45.12
H-test (p)– – – 0.612
DWH-test (p)  0.085 0.036 0.033
Macro FEYes Yes Yes Yes
Time FEYes Yes Yes Yes
Period2004–2019 2004–2019 2004–2019 2004–2019
Obs312 312 312 312

Note(s): *p < 0.1; **p < 0.05; ***p < 0.01; standard errors clustered at regional level in brackets; Digital Economy (DE2): broadband deployment in businesses; FS: 1st Stage; F-test: F-test on excluded instruments; H-test: Hansen J test on over-identifying restrictions; Durbin–Wu–Hausman-test (DWH): endogeneity test defined as the difference of two Sargan–Hansen statistic

Source(s): Authors’ elaboration

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