| This study does not make any attempts to correct for the self-selection of women into the labour force. |
| For example, they may think that self-selection is prevalent among program participants. |
| Delegations questioned the appropriateness of self-selection for the assessment, particularly in comparing the old and new systems. |
| There is still, however, a considerable margin of self-selection of American economic leadership. |
| Another caveat is related to the self-selection bias resulting from the high non-response rate. |
| Identifying the topic can sometimes lead to unwanted self-selection, where certain types of respondents opt into a survey and others opt out. |
