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Table 13 Regression analysis for SC_adjusted

From: Does supplier concentration matter to investors during the COVID-19 crisis: evidence from China?

Variables

\({R}^{{{\prime}}{{\prime}}}\)[− 1, 1]

All

\({R}^{{{\prime}}{{\prime}}}\)[− 2, 2]

All

\({R}^{{{\prime}}{{\prime}}}\)[− 1, 1]

Secondary

\({R}^{{{\prime}}{{\prime}}}\)[− 2, 2]

Secondary

\({R}^{{{\prime}}{{\prime}}}\)[− 2, 100]

All

\({R}^{{{\prime}}{{\prime}}}\)[− 2, 100]

Secondary

SC_adjusted

− 8.462***

(− 2.97)

− 8.611**

(− 2.57)

− 10.403***

(− 5.53)

− 10.177***

(− 4.05)

− 13.809**

(− 2.11)

− 19.288**

(− 2.30)

 LnAsset

1.212***

(4.67)

1.342***

(3.90)

1.521***

(5.54)

1.719***

(4.53)

2.013***

(4.67)

2.539***

(6.37)

 BM

− 5.769***

(4.67)

− 6.335***

(− 4.34)

− 5.805***

(− 4.02)

− 6.080***

(− 3.16)

− 17.209***

(− 4.82)

− 19.666***

(− 4.89)

 Leverage

− 3.071

(− 1.44)

− 5.485**

(− 2.54)

− 4.216*

(− 1.77)

− 6.763**

(− 2.82)

− 16.314

(− 1.54)

− 17.741*

(− 1.78)

 Constant

2.299

(0.59)

3.233

(0.96)

2.243

(0.48)

2.787

(0.71)

23.888***

(5.25)

27.188***

(5.29)

 Location FE

Yes

Yes

Yes

Yes

Yes

Yes

 Observations

2302

2302

1844

1844

2302

1844

 R-squared

0.149

0.138

0.161

0.142

0.098

0.115

  1. Cumulative abnormal return (\({R}^{{{\prime}}{{\prime}}})\) based on CAPM for short- and medium-term event windows as DV and SC_adjusted as IV. All of the regressions include control variables, location effects. *, **, and *** indicate significance at the 10%, 5%, and 1% levels, respectively. All reported t statistics are based on standard errors adjusted for clustering at the industry level