Research population and sample
| FTSE All-share and FTSE Fledgling | 753 | |
| Less: Financial companies | −326 | |
| Non-Financial FTSE All-shares and FTSE Fledgling | 427 | |
| Less: Non-financial FTSE 100 companies | −77 | |
| Less: Companies with insufficient/missing data | −18 | |
| Final sample | 332 | |
| FTSE 250 | 44% | 146 |
| FTSE SmallCap | 34% | 114 |
| FTSE Fledgling | 22% | 72 |
| 100% | 332 |
| FTSE All-share and FTSE Fledgling | 753 | |
| Less: Financial companies | −326 | |
| Non-Financial FTSE All-shares and FTSE Fledgling | 427 | |
| Less: Non-financial FTSE 100 companies | −77 | |
| Less: Companies with insufficient/missing data | −18 | |
| FTSE 250 | 44% | 146 |
| FTSE SmallCap | 34% | 114 |
| FTSE Fledgling | 22% | 72 |