NATIONAL BUREAU OF ECONOMIC RESEARCH
NATIONAL BUREAU OF ECONOMIC RESEARCH

NBER Publications by Didem Bernard

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Working Papers and Chapters

October 2013The Distribution of Public Spending for Health Care in the United States in 2010
with Yuriy Pylypchuk, Thomas Selden
in Measuring and Modeling Health Care Costs, Ana Aizcorbe, Colin Baker, Ernst Berndt, and David Cutler, editors
January 2010Does Prescription Drug Adherence Reduce Hospitalizations and Costs?
with William Encinosa, Avi Dor: w15691
We estimate the impact of diabetic drug adherence on hospitalizations, ER visits, and hospital costs, using insurance claims from MarketScanĀ® employer data. However, it is often difficult to measure the impact of drug adherence on hospitalizations since both adherence and hospitalizations may be correlated with unobservable patient severity. We control for such unobservables using propensity score methods and instrumental variables for adherence such as drug coinsurance levels and direct-to- consumer-advertising. We find a significant bias due to unobservable severity in that patients with more severe health are more apt to comply with medications. Thus, the relationship between adherence and hospitalization will be underestimated if one does not control for unobservable severity. Overall,...

Contact and additional information for this authorAll papers and publicationsWorking Papers onlyWorking Papers with publication info

 
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