Descriptive statistics of variables
| Variable | Minimum | Maximum | Mean | SD |
| Tax avoidance | 0 | 1.4662 | 0.4739 | 0.4294 |
| Audit fee | 7.6434 | 10.284 | 8.7648 | 0.4076 |
| Audit tenure | 1 | 12 | 3.7238 | 2.4675 |
| Days to sign | 1.2787 | 2.2504 | 1.8462 | 0.1756 |
| Accruals | 0 | 3.1840 | 0.2142 | 0.5055 |
| Firm size | 5.7842 | 6.3344 | 6.0501 | 0.1957 |
| ROA | −0.5087 | 0.812 | 0.1311 | 0.4087 |
| Divide | −0.8121 | 1002.50 | 2.0643 | 44.160 |
| Firm age | 0.6989 | 1.6720 | 1.1730 | 0.1771 |
| Leverage | 0.657 | 3.0801 | 0.7261 | 0.3684 |
| Qualitative variables | ||||
| Variable | Variable status | Frequency | Relative frequency (%) | |
| Type of audit opinion | The auditor’s report is unqualified | 237 | 43 | |
| The auditor’s report is qualified | 309 | 57 | ||
| Auditor industry specialization | The auditor is an industry specialist | 229 | 42 | |
| The auditor is not an industry specialist | 317 | 58 | ||
| Auditor size | Firms audited by the audit organization | 132 | 24 | |
| Firms not audited by the audit organization | 414 | 76 | ||
| Loss | Net income of firms is positive | 267 | 49 | |
| Net income of firms is negative | 279 | 51 | ||
| Variable | Minimum | Maximum | Mean | SD |
| Tax avoidance | 0 | 1.4662 | 0.4739 | 0.4294 |
| Audit fee | 7.6434 | 10.284 | 8.7648 | 0.4076 |
| Audit tenure | 1 | 12 | 3.7238 | 2.4675 |
| Days to sign | 1.2787 | 2.2504 | 1.8462 | 0.1756 |
| Accruals | 0 | 3.1840 | 0.2142 | 0.5055 |
| Firm size | 5.7842 | 6.3344 | 6.0501 | 0.1957 |
| ROA | −0.5087 | 0.812 | 0.1311 | 0.4087 |
| Divide | −0.8121 | 1002.50 | 2.0643 | 44.160 |
| Firm age | 0.6989 | 1.6720 | 1.1730 | 0.1771 |
| Leverage | 0.657 | 3.0801 | 0.7261 | 0.3684 |
| Qualitative variables | ||||
| Variable | Variable status | Frequency | Relative frequency (%) | |
| Type of audit opinion | The auditor’s report is unqualified | 237 | 43 | |
| The auditor’s report is qualified | 309 | 57 | ||
| Auditor industry specialization | The auditor is an industry specialist | 229 | 42 | |
| The auditor is not an industry specialist | 317 | 58 | ||
| Auditor size | Firms audited by the audit organization | 132 | 24 | |
| Firms not audited by the audit organization | 414 | 76 | ||
| Loss | Net income of firms is positive | 267 | 49 | |
| Net income of firms is negative | 279 | 51 | ||
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