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- 저자 : Mitchell Ratner (검색결과 3 건)
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DO SECTOR RETURNS LEAD THE STOCK MARKET? THE INTERNATIONAL EVIDENCE
Mitchell Ratner,Ilhan Meric,Gulser Meric People&Global Business Association 2006 Global Business and Finance Review Vol.11 No.2
This paper investigates the lead/lag relationship between the returns of a country's stock market index and 10 primary sector index returns. The sample consists of the Group of Seven (G-7) industrialized countries from January 1974 through December 2003. This study documents a statistically significant lead/lag relationship between sector returns and the stock market index returns in all seven countries. No sector is consistently significant across countries. The results of this study support the gradual information diffusion hypothesis: information travels slowly between asset classes.
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PORTFOLIO DIVERSIFICATION WITH COUNTRY INDEX FUNDS
Gulser Meric,Mitchell Ratner,Ilhan Meric People&Global Business Association 2008 Global Business and Finance Review Vol.13 No.2
In this paper, we use a novel application of the Capital Assets Pricing Model (CAP M) with country betas to determine if U.S. investors would benefit by adding iShares exchange-traded country index funds into their portfolios. Our findings indicate that U.S. investors would benefit by including any of the 21 iShares country index funds studied in the paper in their portfolios. We also use the Markowitz mean-variance portfolio optimization approach to determine which iShares country index funds can make the greatest contribution to global portfolios. We find that U.S. investors could increase the portfolio return per unit of volatility risk by increasing the foreign investment component in their global portfolios.
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Financial toxicity in patients with gynecologic malignancies: a cross sectional study
Burak Zeybek,Emily Webster,Natalia Pogosian,Joan Tymon-Rosario,Alan Balch,Gary Altwerger,Mitchell Clark,Gulden Menderes,Gloria Huang,Masoud Azodi,Elena S. Ratner,Peter E. Schwartz,Alessandro D. Santin 대한부인종양학회 2021 Journal of Gynecologic Oncology Vol.32 No.6
Objective: To evaluate financial toxicity and assess its risk factors among patients with gynecologic cancers. Methods: This is a cross sectional study that included 2 survey tools, as well as patient demographics, disease characteristics, and treatment regimen. Financial toxicity is measured by validated Comprehensive Score for Financial Toxicity (COST) tool. Participants were also asked to complete a 55-question-survey on attitudes and perspectives surrounding cost of care. Descriptive statistics was used to report patient demographics. Spearman's rank correlation was calculated to assess the relation between financial toxicity and patient/ disease related variables. Graphpad Prism Software Version 8.0 was used for analyses. Results: A total of 50 patients with various gynecologic malignancies were enrolled. Median COST score was 20.5 (range, 1–33). Sixty-five percent of the patients reported being in debt due to their cancer care and 4% filed bankruptcy. Correlation analysis showed that COST score was correlated with age (r=−0.3, p=0.028), malignancy type (r=0.3, p=0.039) and income (r=0.3, p=0.047). Ovarian cancer patients had significantly less financial toxicity (median COST score=23) when compared to patients with other gynecologic malignancies (median COST score=17, p=0.043). When scores were dichotomized into low (score ≥22) and high toxicity (score <22), 58% (29/50) of the patients were noted to have high financial toxicity. Enrollment to a clinical trial did not significantly alleviate financial burden. Conclusion: Financial toxicity is a significant burden even among highly insured gynecologic oncology patients. Age, malignancy type and income were correlated with high financial burden.
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