Ekonomi Bölümü Koleksiyonu

Permanent URI for this collectionhttps://hdl.handle.net/20.500.11779/1936

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    Assessing Health Care Resource Utilization and Costs Among Us Veterans Diagnosed With Asthma
    (2016) Ogbomo, A; Tan, H; Kariburyo, F; Xie, L; Başer, Onur
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    Assessing the Economic Burden and Health Care Utilization of Attention Deficit/Hyperactivity Disorder Among Us Medicaid Patients
    (2016) Zhang Q; Zhao, Y; Keshishian, A; Xie, L; Yuce, H; Başer, Onur
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    Assessing the Economic Burden of Rheumatoid Arthritis Patients With Different Clinical Disease Activity Index Scores: a Probabilistic Matching Study
    (2016) Kariburyo, F; Du, J; Xie, L; Başer, Onur
    To evaluate the health care resource utilization and economic burdenof rheumatoid arthritis (RA) based on the Clinical Disease Activity Index(CDAI). Adult patients diagnosed with RA (International Classificationof Diseases, Ninth Revision, Clinical Modification code 714.xx) were identified froma large claims database and a RA registry from 2006-2015. Patients identified wereprobabilistically matched with a 1:1 ratio based on age, gender, state, and indexyear. The first RA diagnosis date was designated as the index date. Patients wererequired to have continuous health plan enrollment with medical and pharmacybenefits for 12 months post-index date (follow-up period). Patients were classifiedas having high (> 22), moderate (> 10 to ≤ 22), or low disease activity (> 2.8 to ≤ 10),or in remission (0 to ≤ 2.8) based on CDAI scores. All-cause and RA-related healthcare costs and utilization during the follow-up period were assessed. A total of 3,749 matched RA patients were identified, and 24.11%, 31.93%, and26.91% had high, moderate, and low disease activity, respectively, and 17.04% werein remission. RA patients were, on average, age 57 years, 76% were female, andmost resided in Washington (77%), with average all-cause total costs of $27,008and RA-related costs of $5,262 during the 12-month follow-up period. The averagenumber of office visits was higher for patients with high disease activity (12.31),followed by 11.79, 11.71, and 11.59 for patients with moderate disease activity, lowdisease activity, and for those in remission. Primary cost drivers were outpatientand pharmacy costs, resulting in total all-cause costs of $28,054, $27,285, $26,633,and $25,600, and total RA-related costs of $5,511, $5,280, $4,893, and $5,461 forpatients with high, moderate, and low disease activity, and for those in remission,respectively. RA patients with high disease activity, measured byCDAI score, have a substantial economic burden.
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    Classifying the European Football Leagues by Using Balance-Performance Matrix
    (Pamukkale University, 2021) Özaydın, Selçuk Mustafa
    European football has transformed over the last two decades both financially and athletically. Although the aggregate revenue generated by the European football increases, some leagues grew richer than the others. The inequality in the distribution of revenue caused the talents to accumulate in the Big 5 leagues and left the others with no chance to compete. Especially after the introduction of Financial Fair Play, teams from other leagues became in desperate need of transfer income which accelerated the accumulation of talent. This paper proposes a matrix, the Balance-Performance Matrix, for classifying leagues with respect to their transfer balance and sportive performance. As the results of the matrix illustrate, some leagues indeed became suppliers for the Big 5 and they have lost their competitive edge whereas some are still competing despite losing their best talents.
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    Cmars Gmm Estimation for Semi-Parametric Models by Conic Optimization
    (2015) Kılıç, Erdem; Weber, Gerhard Wilhelm
    The well-known Generalized Method of Moments (GMM) estimation methodology has been evaluated in various specifications. We propose a novelity in GMM estimation by introducing Conic Quadratic Programming (CQP). The proposed model builds up a flexible tool to model financial data. In our study, we first derive and explain our model specifications (semi parametric model). We identify the moment conditions, that are satisfied by the unknown parameters of the model. These moment conditions are determined by the implementation of Conic Quadratic Optimization. In order to generalize our model for the process, which has infinite number of observations, we proof that our model conditions are efficient and consistent. It is shown that consistency can be achieved through convergence of the model parameters towards the true parameters. By the help of Tikhonov regularization, we construct a minimum distance measure and identify the conditions under which convergence is achieved. Asymptotic distribution of the CQP-estimated GMM estimator is evaluated based on the variance-covariance matrix.
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    Comparing Health Care Resource Utilization and Costs Among Obese Patients in the Us Medicaid Population
    (2016) Zhang, Q; Zhao, Y; Keshishian, A; Xie, L; Yuce H.; Başer, Onur
    Objectives : To evaluate health care resource utilization and costs among obese patients in the U.S. Medicaid population.
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    Comparison of Short Term Bleeding-Related Health Care Utilization and Costs Among Treatment-Naïve Non-Valvular Atrial Fibrillation Patients Initiating Apixaban, Dabigatran, Rivoxaban or Warfarin
    (2015) Keshishian, A; Xie, L; Başer, Onur; Price, K; Vo, L; Singh, P; Bruno, A; Mardekian, J; Tan, W; Singha, S; Patel C; Odell, K; Trocio J.
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    Contagion Effects in Forward and Spot Foreign Exchange Markets
    (2017) Kılıç, Erdem
    Contagion effects in the Forex Markets are estimated by the help of a bivariate Hawkes diffusion model. Contagion occurs in most cases beyond volatility. n this regard, asymmetry in these expectations is involved. The asymmetry depends on each currency pair. Internal market dynamics, as well as the transmission of country-specific dynamics are important features in determining the exact impact of the asymmetry on the evolution of these parameters.
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    Ekonomik Öncü Göstergelerinin Bes Katılımcı Sayısı Üzerindeki Etkisi
    (Maliye Finans Yazıları Dergisi, 2014) Kılıç, Erdem
    Ekonomik öncü göstergelerinin Bireysel Emeklilik Sistemi (BES) katılımcı sayısı üzerindeki etkisi sayıma dayalı olan yöntemler ile araştırılmıştır. Geçinme endeksinde bulunan tüm değişkenler ile katılımcı sayısı arasında pozitif bir ilişki bulunmuştur. Harcamalar, BES katılımcı sayısı üzerinde pozitif bir etkiye sahipken, katılımcı sayısı tasarruflar ele alındığında düşmektedir. Dayanıksız mallar ve hizmetler için yapılan harcamalar katılımcı sayısı üzerinde büyük bir etkiye sahiptirler. Enflasyon ve BES katılımcı sayısı arasında anlamlı bir ilişki bulunmaktadır. BES katılımı ile ilgili ileriye yönelik projeksiyonlarda, devlet katkı payının ve toplumdaki BES’e ilişkin bilinçlenmenin etkileri analize dahil edilmelidir.
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    Citation - Scopus: 22
    Epidemiology and Economic Burden of Serotonin Syndrome With Concomitant Use of Serotonergic Agents: a Retrospective Study Utilizing Two Large Us Claims Databases
    (Physicians Postgraduate Press Inc., 2017) Alley, Stephanie; Nguyen, Charles T.; McCarron, Robert M.; Wang, Zhixiao; Xie, Lin; Başer, Onur
    Objective: Serotonin syndrome (SS) is an adverse drug reaction occurring among patients receiving serotonergic agents (SAs), and although SAs are commonly prescribed, the epidemiology and economic burden of SS with concomitant SA use have not been comprehensively examined. The objective of this study was to investigate the prevalence, incidence, and economic burden of SS with SA use. Methods: A retrospective cohort study was conducted using Veterans Health Administration (VHA) records (identification period: October 1, 2008-September 30, 2012) and commercially insured patient records (Intercontinental Marketing Services PharMetrics Plus; identification period: January 1, 2010-December 31, 2013). Cohorts were based on drug classification and exposure: single monoamine oxidase inhibitor (MAOI), MAOIs in combination with SAs, single non-MAOI SA, and multiple non-MAOI SAs (2, 3, 4, ? 5). Participants were aged ? 18 years with continuous health plan enrollment for 12 months prior to the first SA claim. Outcomes were SS events (ICD-9-CM: 333.99), annual incidence and prevalence, related health care utilization and costs, and SS incidence relative risk. Results: Over 15 million patients were identified and categorized by SA prescription type. SS incidence in both populations decreased: 0.19%-0.07% (VHA) and 0.17%-0.09% (commercially insured). Overall SS prevalence decreased during the study period. Compared to single non-MAOI SA patients, SS incidence relative risk was highest among patients prescribed ? 5 non-MAOI SAs. Inpatient stays accounted for 4.35% (VHA) and 0.88% (commercially insured) of all SS events. Of SS-related inpatient stays, median costs were $8,765 (VHA) and $10,792 (commercially insured). Conclusions: SS incidence and prevalence and SS-related hospitalization risk among patients prescribed SAs were low in both populations. This study provides additional information regarding SS risk associated with SA use. © 2017, Physicians Postgraduate Press Inc. All rights reserved.
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    Evaluating Asthma-Related Expenses and Health Care Resource Utilization Among Children in the Us Medicaid Population
    (2016) Zhang, Q; Zhao, Y; Keshishian, A; Xie L; Yuce H.; Başer, Onur
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    Evaluating the Economic Burden and Health Care Utilization of Anemia in the Us Medicare Population
    (2016) Tan, H; Xie, L; Başer, Onur; Yuce, H; Wang Y.
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    Evaluation of the Burden of Opioid Abuse Among Us Veteran Patients
    (2015) Başer, Onur; Ogbomo, A; Tan, H; Du, J; Xie L.
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    Evaluation of the Burden of Parkinson’s Disease in Medicare and Linked Long Term Care Populations
    (2015) Xie, L; Tan, H; Ogbomo, A; Wang, Y; Başer, Onur; Yuce H.
    Objectives: To examine the economic burden and health care utilization forpatients diagnosed with Parkinson’s disease using linked data from Medicare andthe Long Term Care (LTC) Minimum Data Set (MDS). Methods: Patients wereincluded in the study if they had at least one diagnosis claim for Parkinson’s disease(International Classification of Diseases, 9thRevision, Clinical Modification code 332.xx) during the identification period (01JUL2008-31DEC2010). The first Parkinson’s disease diagnosis claim date was designated as the index date. Patients were requiredto be age ?65 and have continuous health plan enrollment with medical benefitsfor 6 months pre- and post-index date. Residents in a LTC facility were defined asstudy patients using two quarterly assessments recorded in the MDS during the6-month baseline period. Demographic and clinical characteristics and follow-uphealth care costs and utilizations were described. Results: After 1:1 matching,1,620 patients were included in each group (disease and control patients), and thebaseline characteristics were well-balanced. Patients with Parkinson’s diseasewere more likely to have inpatient stays (14.26% vs. 9.51%, p<0.0001), outpatientvisits (47.72% vs. 41.11%, p=0.0002), skilled nursing facility (SNF) visits (20.37% vs.4.51%, p<0.0001), hospice visits (8.64% vs. 1.36%, p<0.0001), and part D pharmacyvisit (62.65% vs. 53.33%, p<0.0001). Compared to control patients, higher all-causehealth care costs were also observed for Parkinson’s disease patients, includinginpatient costs ($2,451 vs. $1,301, p<0.0001), SNF costs ($2,503 vs. $778, p<0.0001),hospice costs ($1,164 vs. $245, p<0.0001), total outpatient costs ($4,477 vs. $1,304,p<0.0001), pharmacy costs ($695 vs. $1,399, p<0.0001) and total costs ($9,775 vs.$5,314, p<0.0001). Conclusions: During a period of 12 months, patients diagnosed with Parkinson’s disease had higher health care utilization and costs thanmatched control patients.
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    Examination of the Economic Burden of Dyslipidemia in the Veterans Health Administration Population
    (2016) Keshishian, A; Tan, H; Xie, L; Başer, Onur
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