The impact of the earthquake on supply network structures
| DV | Δ in-degree centrality | Δ out-degree centrality | Δ ego network density | |||
|---|---|---|---|---|---|---|
| Model 1 | Model 2 | Model 3 | Model 4 | Model 5 | Model 6 | |
| Earthquake | −9.631*** (2.015) | −3.490** (1.170) | −0.907* (0.422) | |||
| In-degree centrality | 0.481** (0.154) | 0.540** (0.157) | 0.109† (0.064) | 0.131* (0.062) | −0.024 (0.017) | −0.018 (0.016) |
| Out-degree centrality | −0.627** (0.237) | −0.708** (0.210) | −0.128 (0.105) | −0.157 (0.105) | 0.024 (0.027) | 0.016 (0.027) |
| Ego network density | 0.326 (0.290) | 0.150 (0.319) | 0.510 (0.353) | 0.446 (0.300) | −0.607* (0.306) | −0.624* (0.291) |
| Log assets | 3.172 (2.280) | 2.288 (2.127) | 1.408 (1.571) | 1.088 (1.527) | −0.302 (0.418) | −0.385 (0.410) |
| Log employees | 2.028 (1.386) | 1.895 (1.374) | 0.366 (0.891) | 0.318 (0.917) | 0.666* (0.291) | 0.654* (0.280) |
| Log inventory | −0.125 (1.456) | −0.088 (1.271) | −0.611 (1.261) | −0.598 (1.225) | −0.092 (0.286) | −0.089 (0.267) |
| Return-on-assets | 0.234 (0.252) | 0.336 (0.269) | −0.552** (0.187) | −0.516** (0.187) | −0.080 (0.052) | −0.071 (0.051) |
| COGS-to-sales | 5.727 (5.843) | 5.419 (5.683) | −21.369*** (4.588) | −21.480*** (4.416) | 2.385† (1.417) | 2.356 (1.344) |
| Cash-to-assets | 1.187 (8.187) | −4.576 (8.947) | 5.217 (6.974) | 3.128 (6.873) | −0.071 (1.696) | −0.614 (1.717) |
| Leverage | 1.916 (1.335) | 1.504 (1.269) | 2.767* (1.364) | 2.618† (1.331) | −0.119 (0.129) | −0.158 (0.131) |
| Sector dummy | Included | Included | Included | Included | Included | Included |
| Constant | −97.437** (34.238) | −64.926† (34.531) | −33.612 (20.524) | −21.831 (19.796) | −1.665 (5.947) | 1.396 (5.802) |
| R-squared | 0.493 | 0.572 | 0.363 | 0.392 | 0.295 | 0.320 |
| Observations | 152 | 152 | 152 | 152 | 152 | 152 |
| DV | ||||||
|---|---|---|---|---|---|---|
| Model 1 | Model 2 | Model 3 | Model 4 | Model 5 | Model 6 | |
| Earthquake | −9.631*** (2.015) | −3.490** (1.170) | −0.907* (0.422) | |||
| In-degree centrality | 0.481** (0.154) | 0.540** (0.157) | 0.109† (0.064) | 0.131* (0.062) | −0.024 (0.017) | −0.018 (0.016) |
| Out-degree centrality | −0.627** (0.237) | −0.708** (0.210) | −0.128 (0.105) | −0.157 (0.105) | 0.024 (0.027) | 0.016 (0.027) |
| Ego network density | 0.326 (0.290) | 0.150 (0.319) | 0.510 (0.353) | 0.446 (0.300) | −0.607* (0.306) | −0.624* (0.291) |
| Log assets | 3.172 (2.280) | 2.288 (2.127) | 1.408 (1.571) | 1.088 (1.527) | −0.302 (0.418) | −0.385 (0.410) |
| Log employees | 2.028 (1.386) | 1.895 (1.374) | 0.366 (0.891) | 0.318 (0.917) | 0.666* (0.291) | 0.654* (0.280) |
| Log inventory | −0.125 (1.456) | −0.088 (1.271) | −0.611 (1.261) | −0.598 (1.225) | −0.092 (0.286) | −0.089 (0.267) |
| Return-on-assets | 0.234 (0.252) | 0.336 (0.269) | −0.552** (0.187) | −0.516** (0.187) | −0.080 (0.052) | −0.071 (0.051) |
| COGS-to-sales | 5.727 (5.843) | 5.419 (5.683) | −21.369*** (4.588) | −21.480*** (4.416) | 2.385† (1.417) | 2.356 (1.344) |
| Cash-to-assets | 1.187 (8.187) | −4.576 (8.947) | 5.217 (6.974) | 3.128 (6.873) | −0.071 (1.696) | −0.614 (1.717) |
| Leverage | 1.916 (1.335) | 1.504 (1.269) | 2.767* (1.364) | 2.618† (1.331) | −0.119 (0.129) | −0.158 (0.131) |
| Sector dummy | Included | Included | Included | Included | Included | Included |
| Constant | −97.437** (34.238) | −64.926† (34.531) | −33.612 (20.524) | −21.831 (19.796) | −1.665 (5.947) | 1.396 (5.802) |
| 0.493 | 0.572 | 0.363 | 0.392 | 0.295 | 0.320 | |
| Observations | 152 | 152 | 152 | 152 | 152 | 152 |
Note(s): Robust standard errors in parenthesis. †p < 0.1, *p < 0.05, **p < 0.01, ***p < 0.001