http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
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.
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.
Jack M. Qian,John M. Stahl,Melissa R. Young,Elena Ratner,Shari Damast 대한부인종양학회 2017 Journal of Gynecologic Oncology Vol.28 No.6
Objective: To examine the outcomes (tolerability, toxicity, and recurrence) of vaginalbrachytherapy (VBT) among endometrial cancer (EC) patients treated with small cylinder size. Methods: Patients with EC who received adjuvant VBT between September 2011 andDecember 2015 were reviewed. Patients were fitted with the largest vaginal cylinder theycould comfortably accommodate, from 2.0–3.0 cm diameter. Small cylinders were defined assize 2.3 cm or less. Patient, tumor, or treatment characteristics were correlated with need forsmall cylinders. Treatment tolerability, measures of gastrointestinal (GI), genitourinary (GU),and vaginal toxicity, and rates of recurrence were analyzed. Results: Three hundred four patients were included. Small cylinders were used in 51 patients(17%). Normal body mass index (BMI; p<0.001), nulligravidity (p<0.001), and shorter vaginallength (p<0.001) were associated with small cylinder size. There was no acute or late grade 3toxicity. Rates of acute (grade 1–2) GI, GU, or vaginal symptoms were low (10%, 11%, and 19%,respectively). Small cylinder size was associated with increased likelihood of reporting acuteGI (p<0.05) but not GU or vaginal symptoms. Small cylinder size was associated with higherrisk of grade 1–2 vaginal stenosis (odds ratio [OR]=4.7; 95% confidence interval [CI]=1.5–14.7;p=0.007). There was no association between cylinder size and recurrence rate (p=0.55). Conclusion: VBT is generally very well tolerated, however, patients fitted with smallercylinders (commonly nulligravid and low BMI) may have increased side effects. Further studyto improve the dosimetry of VBT for patients requiring small cylinders may be worthwhile.
Li, Zhihai,Smeu, Manuel,Park, Tae-Hong,Rawson, Jeff,Xing, Yangjun,Therien, Michael J.,Ratner, Mark A.,Borguet, Eric American Chemical Society 2014 NANO LETTERS Vol.14 No.10
<P>Single molecule break junction experiments and nonequilibrium Green’s function calculations using density functional theory (NEGF-DFT) of carbodithioate- and thiol-terminated [5,15-bis(phenylethynyl)-10,20-diarylporphinato]zinc(II) complexes reveal the impact of the electrode-linker coordination mode on charge transport at the single-molecule level. Replacement of thiolate (−S<SUP>–</SUP>) by the carbodithioate (−CS<SUB>2</SUB><SUP>–</SUP>) anchoring motif leads to an order of magnitude increase of single molecule conductance. In contrast to thiolate-terminated structures, metal–molecule–metal junctions that exploit the carbodithioate linker manifest three distinct conductance values. We hypothesize that the magnitudes of these conductances depend upon carbodithoate linker hapticity with measured conductances across Au-[5,15-bis(4′-(dithiocarboxylate)phenylethynyl)-10,20-diarylporphinato]zinc(II)-Au junctions the greatest when both anchoring groups attach to the metal surface in a bidentate fashion. We support this hypothesis with NEGF-DFT calculations, which consider the electron transport properties for specific binding geometries. These results provide new insights into the origin of molecule-to-molecule conductance heterogeneity in molecular charge transport measurements and the factors that optimize electrode–molecule–electrode electronic coupling and maximize the conductance for charge transport.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/nalefd/2014/nalefd.2014.14.issue-10/nl502466a/production/images/medium/nl-2014-02466a_0007.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/nl502466a'>ACS Electronic Supporting Info</A></P>
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.