Insurance for prescription drugs is characterized by two types of cost-sharing: flat copayments and variable coinsurance. We develop a theoretical model to show that refill purchases of preventive drugs (compliance) are lower under coinsurance due to the consumer's exposure to variation in drug...

We estimate the impact of diabetic drug adherence on hospitalizations, ER visits, and hospital costs, using insurance claims from MarketScan® employer data. However, it is often difficult to measure the impact of drug adherence on hospitalizations since both adherence and hospitalizations may...

"Insurance for prescription drugs is characterized by two types of cost-sharing: flat copayments and variable coinsurance. We develop a theoretical model to show that refill purchases of drugs are lower under coinsurance due to the consumer's exposure to variation in drug prices. We test this...

Background: With the rapid growth in the volume of HIV-related studies that address drug interactions, appropriate medication regimens, and when and how to alter drug regimens, it is challenging for physicians to stay informed. Physicians require knowledge about all drugs taken by HIV patients...

We develop a model of competition among health maintenance organizations (HMOs) to analyze the effects of market power, scale economies, and asymmetric knowledge of health risk on market outcomes. We find that competition among HMOs may, but need not, ensure socially preferred outcomes. Market...

Drug benefits have responded to the rise in drug costs by increasing patient cost sharing. However, many now realize that increasing cost sharing for high-value preventive-care drugs can be detrimental in terms of reducing patient drug adherence and causing increased inpatient and outpatient...

Direct-to-consumer advertising (DTCA) for drugs has increased from US$200 million in 1997 to US$4 billion in 2011. While studies show that DTCA impacts the patient-physician relationship, little is known of the effect of DTCA on health insurance markets. We test whether DTCA raises the costs in...

<Emphasis Type="Bold">Background: While much is known about the association between drug regimen complexity and drug adherence, little is known about how this association is affected by patient depression. <Emphasis Type="Bold">Objective: To examine whether the relationship between medication adherence and highly active antiretroviral...</emphasis></emphasis>