Table 5. Examples of impactful advances.

Advance	Nature of impact
Discoveries	Revisions of benchmark models (typically rare).
Null results	Rejections of previously promising speculative models.
Exploratory advances	Formulations of newly promising speculative models.
Conceptual advances	Discoveries of explanatory gaps that enable exploratory advances.
Methodological advances	Improvements in data or analysis that support all the other advances.