Table 3

The impact of the earthquake on supply network structures

DVΔ in-degree centralityΔ out-degree centralityΔ ego network density
Model 1Model 2Model 3Model 4Model 5Model 6
Earthquake −9.631*** (2.015) −3.490** (1.170) −0.907* (0.422)
In-degree centrality0.481** (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 density0.326 (0.290)0.150 (0.319)0.510 (0.353)0.446 (0.300)−0.607* (0.306)−0.624* (0.291)
Log assets3.172 (2.280)2.288 (2.127)1.408 (1.571)1.088 (1.527)−0.302 (0.418)−0.385 (0.410)
Log employees2.028 (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-assets0.234 (0.252)0.336 (0.269)−0.552** (0.187)−0.516** (0.187)−0.080 (0.052)−0.071 (0.051)
COGS-to-sales5.727 (5.843)5.419 (5.683)−21.369*** (4.588)−21.480*** (4.416)2.385 (1.417)2.356 (1.344)
Cash-to-assets1.187 (8.187)−4.576 (8.947)5.217 (6.974)3.128 (6.873)−0.071 (1.696)−0.614 (1.717)
Leverage1.916 (1.335)1.504 (1.269)2.767* (1.364)2.618 (1.331)−0.119 (0.129)−0.158 (0.131)
Sector dummyIncludedIncludedIncludedIncludedIncludedIncluded
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-squared0.4930.5720.3630.3920.2950.320
Observations152152152152152152

Note(s): Robust standard errors in parenthesis. p < 0.1, *p < 0.05, **p < 0.01, ***p < 0.001

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