Reference pricing versus co-payment in the pharmaceutical industry: : price, quality and market coverage

Within a horizontally differentiation model, we analyse the relative effects of reference pricing and copayment reimbursement on firms pricing and quality strategies as well as on market coverage under different market structures: competitive market, local monopolies and exogenous full market coverage. Results allow us to shed some light on the welfare and total drug expenditure implications of different drug reimbursement policies.