| PEPj | = | the ratio of mean practice expenses to mean total (gross) practice revenue for specialty j, and |
| PSi,j | = | the proportion of service i provided by specialty j. |
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.