Home About us Contact
|
Home About us Contact | ||
|
|
||
Subsequent Returns (subsequent + return)
Selected AbstractsPredicting Hospital Admission and Returns to the Emergency Department for Elderly PatientsACADEMIC EMERGENCY MEDICINE, Issue 3 2010Michael A. LaMantia MD Abstract Objectives:, Methods to accurately identify elderly patients with a high likelihood of hospital admission or subsequent return to the emergency department (ED) might facilitate the development of interventions to expedite the admission process, improve patient care, and reduce overcrowding. This study sought to identify variables found among elderly ED patients that could predict either hospital admission or return to the ED. Methods:, All visits by patients 75 years of age or older during 2007 at an academic ED serving a large community of elderly were reviewed. Clinical and demographic data were used to construct regression models to predict admission or ED return. These models were then validated in a second group of patients 75 and older who presented during two 1-month periods in 2008. Results:, Of 4,873 visits, 3,188 resulted in admission (65.4%). Regression modeling identified five variables statistically related to the probability of admission: age, triage score, heart rate, diastolic blood pressure, and chief complaint. Upon validation, the c-statistic of the receiver operating characteristic (ROC) curve was 0.73, moderately predictive of admission. We were unable to produce models that predicted ED return for these elderly patients. Conclusions:, A derived and validated triage-based model is presented that provides a moderately accurate probability of hospital admission of elderly patients. If validated experimentally, this model might expedite the admission process for elderly ED patients. Our models failed, as have others, to accurately predict ED return among elderly patients, underscoring the challenge of identifying those individuals at risk for early ED returns. ACADEMIC EMERGENCY MEDICINE 2010; 17:252,259 © 2010 by the Society for Academic Emergency Medicine [source] Women's perceptions of chemotherapy-induced cognitive side affects on work ability: a focus group studyJOURNAL OF CLINICAL NURSING, Issue 9-10 2010Fehmidah Munir Aims and objectives., To investigate women's awareness of chemotherapy-induced cognitive changes, their perception of cognitive limitations in carrying out daily tasks and subsequent return to work decisions and perceptions of work ability. Background., Evidence suggests that women diagnosed with breast cancer experience cognitive changes as a consequence of chemotherapy treatment. Although these changes tend to be subtle deficits in memory, concentration and the ability to organise information, there has been no published research identifying how they can impact patient's ability to work and subsequent employment decisions. Design., This was a qualitative study. Method., Data were collected from breast cancer survivors using semi-structured interviews with two focus groups (n = 6, n = 7). Interviews were transcribed verbatim and analysed using template analysis. Results., Data were categorised into four main themes: (1) awareness of cognitive changes during and following chemotherapy, (2) cognitive ability and confidence in return to work, (3) impact of cognitive changes on work ability and (4) information on the cognitive side effects of chemotherapy. Conclusions., The views and experiences of breast cancer survivors towards returning to work and subsequent work ability were affected by chemotherapy-induced cognitive impairment. More specifically the appraisal of returning to work and ability to manage work were influenced by three interrelated factors: (1) actual cognitive ability following chemotherapy, (2) awareness of cognitive failures by the women and their families and (3) the subsequent impact on their confidence in carrying out daily tasks including work tasks. Relevance to clinical practice., More information and support is needed to help patients with cancer to manage chemotherapy-induced cognitive impairments in home and workplace. Nurses are increasingly asked about the impact of cancer and its treatment on work and are therefore well positioned to offer this advice. Subsequently, nurses require additional knowledge and guidance to provide this information and support. [source] Vascular endothelial growth factor gene expression in middle cerebral artery occlusion in the ratACTA ANAESTHESIOLOGICA SCANDINAVICA, Issue 4 2005F. Lennmyr Background:, Focal cerebral ischemia induces up-regulation of angiogenic growth factors such as vascular endothelial growth factor (VEGF), which may have both beneficial and harmful effects to the ischemic brain. Vascular endothelial growth factor is up-regulated in models of brain ischemia, but the underlying mechanisms in vivo remain unclear. In the present report we have investigated the concomitant changes in VEGF and glyceraldehyde dehydrogenase (GAPDH) mRNA expression in a model of permanent and transient cerebral ischemia. Methods:, Male Sprague-Dawley rats were exposed to permanent or transient (2 h) middle cerebral artery occlusion (PMCAO, TMCAO). Brain samples were collected at survival times ranging from 6 h to 1 week, and the levels of VEGF164 and GAPDH mRNA were determined using reverse-transcriptase real-time polymerase chain reaction (RT-PCR). Results:, The VEGF mRNA levels decreased gradually over the observation period in a similar manner in both PMCAO and TMCAO. Maximum levels, seen at early observation time points, did not significantly deviate from sham controls. No statistically significant changes in GAPDH mRNA levels were observed, but there was a tendency towards a postischemic decrease with subsequent return to control levels over time. The VEGF/GAPDH ratio followed a pattern of decrease similar to VEGF mRNA alone. Conclusion:, The VEGF mRNA levels at 6 h after MCAO remain near baseline and thereafter decline, regardless of whether the occlusion is permanent or transient (2 h). The findings raise the question of other than transcriptional regulation of VEGF in cerebral ischemia. [source] Monetary Policy with an Endogenous Capital Stock When Inflation is PersistentTHE MANCHESTER SCHOOL, Issue S1 2002Richard Mash The paper presents a monetary policy model with an endogenous capital stock when a backward,looking element in wage setting causes inflation persistence. We analyse how the endogeneity of the capital stock changes the macroeconomic dynamics with which policy interacts and its implications for optimal policy and time inconsistency. Capital stock endogeneity makes inflation more persistent in reduced form. This makes the optimal contemporaneous policy response to shocks more vigorous but the subsequent return to steady state more gradual. Observed output becomes more serially correlated. Capital endogeneity can also give rise to disinflation bias under discretion for some parameter values. [source] Return Linkages between Dual Listings under Arbitrage Restrictions: A Study of Indian Stocks and Their London Global Depositary ReceiptsFINANCIAL REVIEW, Issue 4 2003Palani-Rajan Kadapakkam G14/G15/N25 Abstract We examine the linkages between returns on Indian global depositary receipts (GDRs) in London and their underlying stocks in India. GDR returns are sensitive to returns observed earlier in India. This sensitivity is more pronounced for more liquid GDRs. Although arbitrage is not feasible for GDRs that sell at a premium, these GDRs are, nevertheless, sensitive to Indian returns. The sensitivity is greater for GDRs selling at a discount, where costly arbitrage is feasible. GDR returns have a significant but small effect on subsequent returns of the underlying stocks, with more liquid GDRs having a slightly greater impact. [source] Causes and Consequences of the Relation Between Split-Adjusted Share Prices and Subsequent Stock ReturnsJOURNAL OF BUSINESS FINANCE & ACCOUNTING, Issue 1-2 2007William D. Brown Jr Abstract:, In this manuscript, we document and explain an empirical artifact , a persistent and substantial negative relation between split-adjusted share prices and subsequent stock returns , that has potentially important ramifications for capital markets research design. This relation pervades all commonly-used commercial databases and is insensitive to the choice of database used for either prices or returns. We investigate four potential causes of the empirical regularity: survivorship bias, asymmetric returns to low-priced stocks, extreme returns, and the effects of stock-split adjustments on portfolio classifications. We find that survivorship bias accounts for approximately half of the returns documented to a share-price-based hedge strategy and that re-classifications caused by stock split adjustments account for substantially all of the remaining returns. We do not find that controlling for either low-priced stocks or extreme returns is effective in purging the data of the empirical price artifact. These findings and our explanations thereof are important, as they show that there are potentially troublesome consequences of using share price as a deflator in markets-based research. In particular, we note and illustrate cause for concern when interpreting associations between share-price-scaled variables and subsequent returns as evidence of market inefficiency. [source] A THEORETICAL AND PRACTICAL PERSPECTIVE ON THE EQUITY RISK PREMIUM,JOURNAL OF ECONOMIC SURVEYS, Issue 2 2008Roelof SalomonsArticle first published online: 10 MAR 200 Abstract In historical perspective, equity returns have been higher than interest rates but have also varied a good deal more. However, the average excess return has been larger than what could be expected based on classical equilibrium theory: the equity risk premium (ERP) puzzle. This paper has two objectives. First, the paper presents a comprehensive overview of the vast literature developed aimed at adjusting theory and testing the robustness of the puzzle. Here we will show that the failure of theory to link asset prices to economics is mostly quantitative by nature and not qualitative (anymore). Second, beyond providing a survey of theory, we aim for a relevant practical angle as well. Our main contribution is that we spend time on why returns have been higher than investors reasonably could have expected. We present evidence that forecasts of equity returns can be enhanced by valuation models: low valuation levels (low price-to-earnings ratios) portend high subsequent returns. While conventional wisdom (several years ago) was to use historical returns to forecast future returns, a growing consensus now recognizes that the predictive power of valuation ratios is preferred. Finally we provide some practical implications based on this predictability. While the ERP is essentially a long-term issue, the likelihood of a lower risk premium increases risk for many and means that short-term volatility might not be neglected. [source] Correlated Trading and ReturnsTHE JOURNAL OF FINANCE, Issue 2 2008DANIEL DORN ABSTRACT A German broker's clients place similar speculative trades and therefore tend to be on the same side of the market in a given stock during a given day, week, month, and quarter. Aggregate liquidity effects, short sale constraints, the systematic execution of limit orders (coordinated through price movements) or the correlated trading of other investors who pick off retail limit orders do not fully explain why retail investors trade similarly. Correlated market orders lead returns, presumably due to persistent speculative price pressure. Correlated limit orders also predict subsequent returns, consistent with executed limit orders being compensated for accommodating liquidity demands. [source] The Development of Secondary Market Liquidity for NYSE-Listed IPOsTHE JOURNAL OF FINANCE, Issue 5 2004SHANE A. CORWIN ABSTRACT For NYSE-listed IPOs, limit order submissions and depth relative to volume are unusually low on the first trading day. Initial buy-side liquidity is higher for IPOs with high-quality underwriters, large syndicates, low insider sales, and high premarket demand, while sell-side liquidity is higher for IPOs that represent a large fraction of outstanding shares and have low premarket demand. Our results suggest that uncertainty and offer design affect initial liquidity, though order flow stabilizes quickly. We also find that submission strategies are influenced by expected underwriter stabilization and preopening order flow contains information about both initial prices and subsequent returns. [source] The Diversification Discount: Cash Flows Versus ReturnsTHE JOURNAL OF FINANCE, Issue 5 2001Owen A. Lamont Diversified firms have different values from comparable portfolios of single-segment firms. These value differences must be due to differences in either future cash flows or future returns. Expected security returns on diversified firms vary systematically with relative value. Discount firms have significantly higher subsequent returns than premium firms. Slightly more than half of the cross-sectional variation in excess values is due to variation in expected future cash flows, with the remainder due to variation in expected future returns and to covariation between cash flows and returns. [source] S&P futures returns and contrary sentiment indicatorsTHE JOURNAL OF FUTURES MARKETS, Issue 5 2001David P. Simon Associate Professor This article investigates the predictive power of popular market-based sentiment measures for subsequent returns on the Standard & Poor's (S&P) 500 futures contract over 10-day, 20-day, and 30-day horizons from January 1989 through June 1999. These measures include the volatility index, the put,call ratio, and the trading index. The empirical results show that these variables over a variety of specifications frequently have statistically and economically significant forecasting power. The results indicate that these variables are contrarian indicators, consistent with the view that periods of extreme fear in the stock market have provided excellent buying opportunities. Finally, out-of-sample trading simulations performed over the second half of the sample period demonstrate that profits and risk-adjusted profits would have been enhanced by buying S&P futures when the fear indicators were high rather than low. © 2001 John Wiley & Sons, Inc. Jrl Fut Mark 21:447,462, 2001 [source] | |||||||||||||||||||||||||