| COST | = | the average dispensing cost per prescription for an individual pharmacy, |
| CONSTANT | = | the intercept or constant term in the equation, |
| TOTALRX | = | a continuous variable, the total number of prescriptions dispensed for the pharmacy, |
| URBAN | = | 1 if the pharmacy is in an urban area, 0 if otherwise, |
| CHAIN | = | 1 if the pharmacy is a chain of 4 or more stores, 0 if otherwise, and |
| PROPMED | = | the proportion of prescriptions filled that were Medicaid. |
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