Comparison of results from OLS, FE, RE and FE-ROBUST in Model 2
| Variables | (1) OLS | (2) FE | (3) RE |
|---|---|---|---|
| Enterprises_providing_portable_d | 0.249*** (0.0606) | 0.203** (0.0984) | 0.224*** (0.0742) |
| Internet_access_of_employees | −0.509*** (0.187) | −0.410 (0.297) | −0.444** (0.224) |
| E_provided_ICT_training | −0.166 (0.109) | −0.0607 (0.170) | −0.123 (0.130) |
| R&D_expenditure | −0.321 (0.918) | 4.670 (4.174) | −0.165 (1.446) |
| Employees | −1.904*** (0.280) | −1.691*** (0.229) | −1.873*** (0.181) |
| Education | 0.272*** (0.0873) | 0.364** (0.145) | 0.297*** (0.107) |
| Type_of_connection | −0.0286 (0.138) | −0.0242 (0.168) | −0.0619 (0.141) |
| Constant | 134.0*** (15.78) | 113.4*** (29.87) | 130.7*** (20.19) |
| Observations | 100 | 100 | 100 |
| R2 | 0.484 | 0.657 | |
| Number of ID | 25 | 25 | |
| Variables | (1) OLS | (2) FE | (3) RE |
|---|---|---|---|
| Enterprises_providing_portable_d | 0.249 | 0.203 | 0.224 |
| Internet_access_of_employees | −0.509 | −0.410 (0.297) | −0.444 |
| E_provided_ICT_training | −0.166 (0.109) | −0.0607 (0.170) | −0.123 (0.130) |
| R&D_expenditure | −0.321 (0.918) | 4.670 (4.174) | −0.165 (1.446) |
| Employees | −1.904 | −1.691 | −1.873 |
| Education | 0.272 | 0.364 | 0.297 |
| Type_of_connection | −0.0286 (0.138) | −0.0242 (0.168) | −0.0619 (0.141) |
| Constant | 134.0 | 113.4 | 130.7 |
| Observations | 100 | 100 | 100 |
| 0.484 | 0.657 | ||
| Number of ID | 25 | 25 | |
Standard errors in parentheses: ***p < 0.01, **p < 0.05 and *p < 0.1
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