OLS and fixed-effects results – baseline interlock definition
| Variables | OLS | Panel – Fixed effect | ||||||
|---|---|---|---|---|---|---|---|---|
| (1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | |
| AvgID_Total | 0.018*** | 0.016** | ||||||
| (5.07) | (1.98) | |||||||
| AvgID_Inside | 0.011*** | 0.011*** | 0.006 | 0.006 | ||||
| (4.75) | (4.86) | (1.07) | (1.00) | |||||
| AvgID_Outside | 0.011*** | 0.011*** | 0.011** | 0.011** | ||||
| (2.85) | (2.92) | (1.97) | (1.99) | |||||
| SIZE | −0.002** | −0.002** | −0.002** | −0.002** | 0.011 | 0.011 | 0.011 | 0.011 |
| (−2.39) | (−2.11) | (−2.07) | (−2.40) | (1.41) | (1.44) | (1.42) | (1.44) | |
| LEV | 0.024*** | 0.024*** | 0.023*** | 0.024*** | 0.063*** | 0.063*** | 0.062*** | 0.063*** |
| (4.98) | (4.94) | (4.69) | (4.86) | (3.11) | (3.11) | (3.09) | (2.95) | |
| CFOt-1 | 0.032** | 0.033** | 0.031** | 0.032** | 0.018 | 0.018 | 0.017 | 0.018 |
| (2.19) | (2.23) | (2.14) | (2.17) | (0.60) | (0.60) | (0.57) | (0.60) | |
| MB | 0.003*** | 0.003*** | 0.003*** | 0.004*** | 0.001 | 0.001 | 0.001 | 0.003 |
| (5.79) | (5.82) | (5.57) | (4.20) | (1.35) | (1.35) | (1.32) | (1.49) | |
| ROAt-1 | −0.059*** | −0.058*** | −0.060*** | −0.064*** | 0.015 | 0.016 | 0.013 | 0.013 |
| (−4.21) | (−4.18) | (−4.33) | (−4.59) | (0.64) | (0.68) | (0.56) | (0.54) | |
| PPEt-1 | −0.042*** | −0.042*** | −0.041*** | −0.043*** | −0.006 | −0.006 | −0.006 | −0.007 |
| (−9.18) | (−9.22) | (−8.95) | (−9.47) | (−0.42) | (−0.40) | (−0.41) | (−0.43) | |
| INTANt-1 | −0.009 | −0.008 | −0.007 | −0.006 | 0.216*** | 0.215*** | 0.209*** | 0.216*** |
| (−0.38) | (−0.33) | (−0.30) | (−0.24) | (2.72) | (2.70) | (2.63) | (2.73) | |
| OWN | −0.033*** | −0.033*** | −0.029*** | −0.034*** | −0.038 | −0.038 | −0.036 | −0.035 |
| (−5.93) | (−5.91) | (−5.20) | (−5.92) | (−1.22) | (−1.23) | (−1.13) | (−1.11) | |
| FOR | −0.016* | −0.016* | −0.016* | −0.018** | −0.006 | −0.007 | −0.006 | −0.008 |
| (−1.76) | (−1.82) | (−1.76) | (−1.98) | (−0.21) | (−0.28) | (−0.23) | (−0.31) | |
| AGE | −0.005*** | −0.005*** | −0.005*** | −0.005*** | −0.001 | −0.001 | −0.001 | −0.000 |
| (−4.80) | (−4.78) | (−4.62) | (−4.72) | (−0.16) | (−0.09) | (−0.12) | (−0.04) | |
| LOSS | 0.008*** | 0.008*** | 0.008*** | 0.008*** | 0.002 | 0.002 | 0.002 | 0.002 |
| (3.63) | (3.59) | (3.46) | (3.73) | (0.85) | (0.83) | (0.86) | (0.94) | |
| BIG4 | 0.004* | 0.004** | 0.004** | 0.004* | – | – | – | – |
| (1.96) | (1.99) | (2.04) | (1.96) | – | – | – | – | |
| N | 3,195 | 3,195 | 3,195 | 3,195 | 3,195 | 3,195 | 3,195 | 3,195 |
| Fixed Effects | ||||||||
| Year | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| Industry | Yes | Yes | Yes | Yes | No | No | No | No |
| Firm | No | No | No | No | Yes | Yes | Yes | Yes |
| Adj R2 | 0.11 | 0.11 | 0.10 | 0.10 | – | – | – | – |
| within R2 | – | – | – | – | 0.03 | 0.03 | 0.03 | 0.03 |
| F-Statistics | 16.68*** | 16.53*** | 15.83*** | 15.48*** | 2.69*** | 2.33*** | 2.52*** | 2.76*** |
| Variables | OLS | Panel – Fixed effect | ||||||
|---|---|---|---|---|---|---|---|---|
| (1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | |
| AvgID_Total | 0.018*** | 0.016** | ||||||
| (5.07) | (1.98) | |||||||
| AvgID_Inside | 0.011*** | 0.011*** | 0.006 | 0.006 | ||||
| (4.75) | (4.86) | (1.07) | (1.00) | |||||
| AvgID_Outside | 0.011*** | 0.011*** | 0.011** | 0.011** | ||||
| (2.85) | (2.92) | (1.97) | (1.99) | |||||
| SIZE | −0.002** | −0.002** | −0.002** | −0.002** | 0.011 | 0.011 | 0.011 | 0.011 |
| (−2.39) | (−2.11) | (−2.07) | (−2.40) | (1.41) | (1.44) | (1.42) | (1.44) | |
| LEV | 0.024*** | 0.024*** | 0.023*** | 0.024*** | 0.063*** | 0.063*** | 0.062*** | 0.063*** |
| (4.98) | (4.94) | (4.69) | (4.86) | (3.11) | (3.11) | (3.09) | (2.95) | |
| CFOt-1 | 0.032** | 0.033** | 0.031** | 0.032** | 0.018 | 0.018 | 0.017 | 0.018 |
| (2.19) | (2.23) | (2.14) | (2.17) | (0.60) | (0.60) | (0.57) | (0.60) | |
| MB | 0.003*** | 0.003*** | 0.003*** | 0.004*** | 0.001 | 0.001 | 0.001 | 0.003 |
| (5.79) | (5.82) | (5.57) | (4.20) | (1.35) | (1.35) | (1.32) | (1.49) | |
| ROAt-1 | −0.059*** | −0.058*** | −0.060*** | −0.064*** | 0.015 | 0.016 | 0.013 | 0.013 |
| (−4.21) | (−4.18) | (−4.33) | (−4.59) | (0.64) | (0.68) | (0.56) | (0.54) | |
| PPEt-1 | −0.042*** | −0.042*** | −0.041*** | −0.043*** | −0.006 | −0.006 | −0.006 | −0.007 |
| (−9.18) | (−9.22) | (−8.95) | (−9.47) | (−0.42) | (−0.40) | (−0.41) | (−0.43) | |
| INTANt-1 | −0.009 | −0.008 | −0.007 | −0.006 | 0.216*** | 0.215*** | 0.209*** | 0.216*** |
| (−0.38) | (−0.33) | (−0.30) | (−0.24) | (2.72) | (2.70) | (2.63) | (2.73) | |
| OWN | −0.033*** | −0.033*** | −0.029*** | −0.034*** | −0.038 | −0.038 | −0.036 | −0.035 |
| (−5.93) | (−5.91) | (−5.20) | (−5.92) | (−1.22) | (−1.23) | (−1.13) | (−1.11) | |
| FOR | −0.016* | −0.016* | −0.016* | −0.018** | −0.006 | −0.007 | −0.006 | −0.008 |
| (−1.76) | (−1.82) | (−1.76) | (−1.98) | (−0.21) | (−0.28) | (−0.23) | (−0.31) | |
| AGE | −0.005*** | −0.005*** | −0.005*** | −0.005*** | −0.001 | −0.001 | −0.001 | −0.000 |
| (−4.80) | (−4.78) | (−4.62) | (−4.72) | (−0.16) | (−0.09) | (−0.12) | (−0.04) | |
| LOSS | 0.008*** | 0.008*** | 0.008*** | 0.008*** | 0.002 | 0.002 | 0.002 | 0.002 |
| (3.63) | (3.59) | (3.46) | (3.73) | (0.85) | (0.83) | (0.86) | (0.94) | |
| BIG4 | 0.004* | 0.004** | 0.004** | 0.004* | – | – | – | – |
| (1.96) | (1.99) | (2.04) | (1.96) | – | – | – | – | |
| 3,195 | 3,195 | 3,195 | 3,195 | 3,195 | 3,195 | 3,195 | 3,195 | |
| Year | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| Industry | Yes | Yes | Yes | Yes | No | No | No | No |
| Firm | No | No | No | No | Yes | Yes | Yes | Yes |
| Adj | 0.11 | 0.11 | 0.10 | 0.10 | – | – | – | – |
| within | – | – | – | – | 0.03 | 0.03 | 0.03 | 0.03 |
| F-Statistics | 16.68*** | 16.53*** | 15.83*** | 15.48*** | 2.69*** | 2.33*** | 2.52*** | 2.76*** |
Note(s): Standard errors are clustered at the firm level
Additional VIF diagnostics indicate that multicollinearity is unlikely to affect the results. The mean VIF is 1.92, and the VIFs for AvgID_Total, SIZE, and FOR are 1.13, 2.15, and 1.71, respectively. The highest VIF among substantive explanatory variables is 2.15 for SIZE
*, **, and *** indicate statistical significance at the 10%, 5%, and 1% levels, respectively
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