Conceptual hybrids get collapsed because analysis cannot handle many categories.

Evidence

In practice, when scholars use Geddes’s data they follow her suggestions and collapse the hybrids back into one of the original four types. It would not be pretty to see a statistical results table with nine dummy variables. — Gary Goertz, Social Science Concepts and Measurement, 1242

Categorization

• XREF: Connects to debates on measurement and coding parsimony in comparative politics datasets (Polity, V-Dem), where fine-grained categories get binned for regression.