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Table 3 Innovation and labour productivity (controlling for firm size)

From: Labour productivity among small- and medium-scale enterprises in Uganda: the role of innovation

Variable Model 1
OLS
Model 2
25th percentile
Model 3
50th percentile
Model 4
75th percentile
Innov
 Innovation_1 0.173
(0.456)
0.0146
(0.950)
0.173
(0.456)
0.0375
(0.874)
 Innovation_2 − 0.185
(0.441)
0.260
(0.279)
− 0.185
(0.441)
− 0.546**
(0.026)
 Innovation_3 0.262
(0.212)
0.478**
(0.024)
0.262
(0.212)
− 0.0376
(0.860)
 Innovation_4 0.639***
(0.001)
0.957***
(0.000)
0.639***
(0.001)
0.0840
(0.672)
Firm age 0.0497**
(0.021)
0.00469
(0.827)
0.0497**
(0.021)
− 0.0288
(0.187)
Firm age squared − 0.802**
(0.042)
− 0.0750
(0.850)
− 0.802**
(0.042)
1.062***
(0.008)
Manager’s years’ experience 0.0127
(0.214)
0.0481***
(0.000)
0.0127
(0.214)
0.00249
(0.810)
Certification (1 = yes) − 0.0194
(0.924)
− 0.362*
(0.076)
− 0.0194
(0.924)
− 0.217
(0.293)
Exporter (1 = yes) 0.753**
(0.010)
1.360***
(0.000)
0.753**
(0.010)
1.515***
(0.000)
Use ICT (1 = yes) 1.175***
(0.000)
1.439***
(0.000)
1.175***
(0.000)
1.262***
(0.000)
Gender (1 = yes) 0.125
(0.443)
− 0.213
(0.193)
0.125
(0.443)
0.0692
(0.676)
Tax rate burden(1 = yes) − 0.540***
(0.000)
− 0.570***
(0.000)
− 0.540***
(0.000)
− 0.930***
(0.000)
Transport burden (1 = yes) − 0.197
(0.174)
− 0.177
(0.221)
− 0.197
(0.174)
0.587***
(0.000)
Land access (1 = yes) − 0.122
(0.400)
− 0.00248
(0.986)
− 0.122
(0.400)
− 0.224
(0.129)
Corruption (1 = yes) 0.0883
(0.562)
− 0.102
(0.504)
0.0883
(0.562)
− 0.325**
(0.036)
Labour education (1 = yes) − 0.216
(0.164)
− 0.0883
(0.571)
− 0.216
(0.164)
− 0.361**
(0.023)
Electricity burden (1 = yes) − 0.0981
(0.477)
0.0893
(0.519)
− 0.0981
(0.477)
0.0139
(0.921)
Credit access (1 = yes) 0.295*
(0.056)
− 0.188
(0.222)
0.295*
(0.056)
0.506***
(0.001)
Medium (1 = yes) 0.471***
(0.003)
− 0.161
(0.308)
0.471***
(0.003)
0.484***
(0.003)
Sectoral fixed effects Yes Yes Yes Yes
Regional fixed effects Yes Yes Yes Yes
Constant 14.92***
(0.000)
15.35***
(0.000)
14.92***
(0.000)
17.15***
(0.000)
Observations 347 347 347 347
R 2 0.143 0.118 0.143 0.166
  1. p values in parentheses, ***p < 0.01, **p < 0.05, *p < 0.1