Main estimated results
| (1) | (2) | (3) | (4) | (5) | (6) | |
|---|---|---|---|---|---|---|
| Baseline | Baseline | Baseline | Poisson | Poisson | Poisson | |
| Variables | n_contract | n_contract | n_contract | n_contract | n_contract | n_contract |
| RdO | 0.286** (0.118) | 0.171** (0.0716) | 0.608** (0.290) | 0.153** (0.0624) | 0.143*** (0.0529) | 0.277*** (0.0599) |
| n_suppliers | 2.002*** (0.135) | 2.152*** (0.223) | 0.114*** (0.0123) | 0.172*** (0.0139) | ||
| RdO × n_suppliers | 0.317 (0.216) | 0.0773*** (0.0176) | ||||
| n_PA | 3.059*** (0.284) | −0.822*** (0.235) | −0.917*** (0.266) | 0.755*** (0.0452) | 0.512*** (0.0459) | 0.374*** (0.0348) |
| Constant | −2.499*** (0.404) | −0.159 (0.183) | −0.398* (0.212) | −0.429*** (0.135) | −0.328*** (0.113) | −0.279** (0.118) |
| Type PA | Yes | Yes | Yes | Yes | Yes | Yes |
| Type MePa | Yes | Yes | Yes | Yes | Yes | Yes |
| Product category (CPV) | Yes | Yes | Yes | Yes | Yes | Yes |
| Region PA | Yes | Yes | Yes | Yes | Yes | Yes |
| Province PA | Yes | Yes | Yes | Yes | Yes | Yes |
| Region supplier | No | Yes | Yes | Yes | Yes | Yes |
| Observations | 6,550 | 6,550 | 6,550 | 6,550 | 6,550 | 6,550 |
| R-squared | 0.158 | 0.748 | 0.752 | |||
| Pseudo R-squared | 0.1594 | 0.2847 | 0.3022 |
| (1) | (2) | (3) | (4) | (5) | (6) | |
|---|---|---|---|---|---|---|
| Baseline | Baseline | Baseline | Poisson | Poisson | Poisson | |
| Variables | ||||||
| RdO | 0.286 | 0.171 | 0.608 | 0.153 | 0.143 | 0.277 |
| n_suppliers | 2.002 | 2.152 | 0.114 | 0.172 | ||
| RdO | 0.317 (0.216) | 0.0773 | ||||
| n_PA | 3.059 | −0.822 | −0.917 | 0.755 | 0.512 | 0.374 |
| Constant | −2.499 | −0.159 (0.183) | −0.398 | −0.429 | −0.328 | −0.279 |
| Type | Yes | Yes | Yes | Yes | Yes | Yes |
| Type MePa | Yes | Yes | Yes | Yes | Yes | Yes |
| Product category ( | Yes | Yes | Yes | Yes | Yes | Yes |
| Region | Yes | Yes | Yes | Yes | Yes | Yes |
| Province | Yes | Yes | Yes | Yes | Yes | Yes |
| Region supplier | No | Yes | Yes | Yes | Yes | Yes |
| Observations | 6,550 | 6,550 | 6,550 | 6,550 | 6,550 | 6,550 |
| R-squared | 0.158 | 0.748 | 0.752 | |||
| Pseudo | 0.1594 | 0.2847 | 0.3022 |
Robust standard errors in parentheses ***p < 0.01, **p < 0.05 and *p < 0.1
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