Table 2 Cross-tabulation between statistical results of TESS studies and their publication status.

Entries are counts of studies by publication status and results. Bolded entries indicate observations included in the final sample for analysis (40). Results are robust to the inclusion of book chapters (table S7).

Unpublished,
not written
Unpublished,
written
PublishedBook
chapter
MissingTotal
Null results317101049
Mixed results1032403186
Strong results431561193
Missing61021221
Total5171106714249