Regression results
| Variables | Model 1 | Model 2 | Model 3 | Model 4 | ||||
|---|---|---|---|---|---|---|---|---|
| Coefficient | t | Coefficient | t | Coefficient | t | Coefficient | t | |
| NKAMs | 0.08** | 3.99 | −0.01 | −0.36 | −0.82** | −4.98 | −0.93** | −5.64 |
| BIG4 | 0.27** | 5.73 | 0.01 | 0.16 | 0.27** | 5.88 | 0.27** | 5.89 |
| NKAMs*BIG4 | 0.12** | 2.65 | ||||||
| GCOs | 0.34** | 3.55 | 0.37** | 3.82 | 0.43** | 4.44 | 0.43** | 4.51 |
| ARL | 0.00** | 3.43 | 0.00** | 3.43 | 0.00** | 3.34 | 0.00** | 3.39 |
| NAFEE | 0.02** | 4.87 | 0.02** | 5.02 | 0.02** | 5.43 | 0.03** | 5.57 |
| ATURN | 0.01** | 4.13 | 0.01** | 4.09 | 0.01** | 4.47 | 0.00** | 4.04 |
| CSIZE | 0.23** | 12.10 | 0.23** | 12.06 | 0.14** | 5.46 | 0.23** | 12.09 |
| NKAMs*CSIZE | 0.04** | 5.51 | ||||||
| CAGE | 0.00 | 1.72 | 0.00 | 1.57 | 0.00 | 1.01 | 0.00 | 0.97 |
| MCAP | 0.09** | 3.77 | 0.07** | 3.93 | 0.07** | 3.93 | 0.07** | 3.92 |
| REV | 0.20** | 10.12 | 0.20** | 9.94 | 0.20** | 10.03 | 0.09** | 3.47 |
| NKAMs*REV | 0.05** | 6.18 | ||||||
| COVID | −0.00 | −0.02 | −0.00 | −0.08 | 0.00 | 0.02 | ||
| Constant | 1.66** | 6.13 | 1.89** | 6.67 | 3.75** | 8.09 | 4.02** | 8.64 |
| Year fixed effects | Yes | Yes | Yes | Yes | ||||
| Observations | 1,163 | 1,163 | 1,163 | 1,163 | ||||
| Prob > F | 0.00 | 0.00 | 0.00 | 0.00 | ||||
| Adj. R-squared | 0.803 | 0.804 | 0.808 | 0.809 | ||||
| Variables | Model 1 | Model 2 | Model 3 | Model 4 | ||||
|---|---|---|---|---|---|---|---|---|
| Coefficient | t | Coefficient | t | Coefficient | t | Coefficient | t | |
| −0.01 | −0.36 | −0.82** | −4.98 | −0.93** | −5.64 | |||
| BIG4 | 0.27** | 5.73 | 0.01 | 0.16 | 0.27** | 5.88 | 0.27** | 5.89 |
| GCOs | 0.34** | 3.55 | 0.37** | 3.82 | 0.43** | 4.44 | 0.43** | 4.51 |
| ARL | 0.00** | 3.43 | 0.00** | 3.43 | 0.00** | 3.34 | 0.00** | 3.39 |
| NAFEE | 0.02** | 4.87 | 0.02** | 5.02 | 0.02** | 5.43 | 0.03** | 5.57 |
| ATURN | 0.01** | 4.13 | 0.01** | 4.09 | 0.01** | 4.47 | 0.00** | 4.04 |
| CSIZE | 0.23** | 12.10 | 0.23** | 12.06 | 0.14** | 5.46 | 0.23** | 12.09 |
| CAGE | 0.00 | 1.72 | 0.00 | 1.57 | 0.00 | 1.01 | 0.00 | 0.97 |
| MCAP | 0.09** | 3.77 | 0.07** | 3.93 | 0.07** | 3.93 | 0.07** | 3.92 |
| REV | 0.20** | 10.12 | 0.20** | 9.94 | 0.20** | 10.03 | 0.09** | 3.47 |
| COVID | −0.00 | −0.02 | −0.00 | −0.08 | 0.00 | 0.02 | ||
| Constant | 1.66** | 6.13 | 1.89** | 6.67 | 3.75** | 8.09 | 4.02** | 8.64 |
| Year fixed effects | Yes | Yes | Yes | Yes | ||||
| Observations | 1,163 | 1,163 | 1,163 | 1,163 | ||||
| Prob > | 0.00 | 0.00 | 0.00 | 0.00 | ||||
| Adj. | 0.803 | 0.804 | 0.808 | 0.809 | ||||
Note(s): The dependent variable is audit fees (AFEE), ** represents significance at 1%, and * represents significance at 5%
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