More regulated cities tended to have higher rents.
Across the cities in this early Wharton dataset, the regulatory index and median contract rent move together.
REDRAWN FROM STUDY DATAFigure 3 · Rent versus city-specific regulation
Figure 3 · Rent versus city-specific regulation. Values digitized from Figure 3; points are a representative digitization of the plotted metropolitan observations in the archived publication; minor reading error is possible.