Walter Adamache

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In this paper we compare physician referral patterns, quality, patient satisfaction, and community benefits of physician-owned specialty versus peer competitor hospitals. Our results are based on evidence gathered from site visits to six markets, 2003 Medicare claims, patient focus groups, and Internal Revenue Service data. Although physician-owners are(More)
BACKGROUND Increasingly, investigators are using administrative databases to answer research questions requiring physician characteristics information. This article provides a roadmap for investigators who use Medicare data to answer such questions, focusing on use of the Surveillance, Epidemiology, and End Results (SEER)-Medicare files. METHODS Three(More)
OBJECTIVE To examine the number of cancer specialists identified in three national datasets, the effect of combining these datasets, and the use of refinement rules to classify physicians as cancer specialists. DATA SOURCES 1992-2003 linked Surveillance, Epidemiology, and End Results (SEER)-Medicare data and a cancer-free comparison population of Medicare(More)
BACKGROUND Studies have shown that follow-up care for cancer patients differs by physician specialty, and that coordination between specialists and generalists results in better care. Little is known, however, regarding which specialties of physicians provide care to long-term cancer survivors. METHODS The authors used Surveillance, Epidemiology, and End(More)
Concern over rapidly rising Medicare expenditures prompted Congress to pass the 1997 Balanced Budget Act (BBA) that included provisions reducing graduate medical education (GME) payments and capped the growth in residents for payment purposes. Using Medicare cost reports through 2001, we find that both actual and capped residents continued to grow post-BBA.(More)
OBJECTIVE To examine the impact of the Medicare Physician Group Practice (PGP) demonstration on expenditure, utilization, and quality outcomes. DATA SOURCE Secondary data analysis of 2001-2010 Medicare claims for 1,776,387 person years assigned to the ten participating provider organizations and 1,579,080 person years in the corresponding local comparison(More)
In this article we consider the estimation of two seemingly unrelated Tobit regressions in which the dependent variables are truncated normal. The model is useful, since it can be viewed as the reduced form of a simultaneous-equations Tobit model. The proposed estimation method and algorithm are interesting in themselves for the following reasons. In the(More)
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