A two-valued qualitative variable can be represented by a single 0-or-1-valued "dummy" variable. If a qualitative variable has three or more possible values (e.g., make-of-car, or marital-status), ...

This is a preview. Log in through your library . Abstract Many interesting sociological questions pertain to how the association between two variables depends on a third variable. In sociological ...

A human craving for simplicity is hindering retail’s optimization of artificial intelligence (AI) and machine learning (ML) across supply and demand planning. Retailers are overlooking qualitative ...

ECONOMISTS develop economic models to explain consistently recurring relationships. Their models link one or more economic variables to other economic variables (see “What Are Economic Models,” F&D, ...