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Table 5 Dimensions and thresholds to partition the ZIP codes into two sets

From: The impact of colleges and hospitals to local real estate markets

Splitting dimension

Splitting threshold

Number of students (ZIP codes with universities)

20,000

Number of doctors (ZIP codes with hospitals)

1000

Median ZIP code home price/rent

National ZIP code average

ZIP code population

National ZIP code average

ZIP code population density

National ZIP code average

Metropolitan area ZIP code, as listed in Zillow data

Yes/no