OBJECTIVES Use of cumulative mortality adjusted for case mix in patients with acute myocardial infarction for early detection of variation in clinical practice. DESIGN Observational study. SETTING 20 hospitals across the former Yorkshire region. PARTICIPANTS All 2153 consecutive patients with confirmed acute myocardial infarction identified during three months. MAIN OUTCOME MEASURES Var...

IMPORTANCE The optimal approach for profiling hospital performance with bariatric surgery is unclear. OBJECTIVE To develop a novel composite measure for profiling hospital performance with bariatric surgery. DESIGN, SETTING, AND PARTICIPANTS Using clinical registry data from the Michigan Bariatric Surgery Collaborative, we studied all patients undergoing bariatric surgery from January 1, 20...

This paper examines persistence of raw and risk-adjusted returns for long/short equity hedge funds using the portfolio approach of Hendricks, Patel and Zeckhauser (1993). Only limited evidence of persistence is found for raw returns. Funds with the highest raw returns last year continue to outperform over the subsequent year, although not significantly while there is no persistence in returns b...

This study aimed at comparing the performances of distinct hedge fund strategies and assessing diversification opportunities using funds. paper analyses overall performance (as indices) for period 2001-2020. Hedge are compared alternative risk adjusted metrics; first, alpha based on four asset-pricing models (CAPM, Fama-French 3 factor, Carhart 5 factor models); then, Sharpe ratio. The findings...

This paper develops a generic adjustment framework to improve in the market risk forecasts of diverse forecasting models, which indicates degree is under- and overestimated. In context energy commodity market, tail management crucial importance, empirical analysis shows that after this applied, performance various models generally improves, as verified by battery backtesting methods. Additional...

Mutual funds are the best tool to mobilize savings and investments in an economy and Pakistan is the pioneer in South Asia, but this industry is not as much mature in comparison to its age in Pakistan. This paper examines the performance of closed ended mutual funds in Pakistan by using five different ranking measures during a period of January 2009 to December 2013 and the sample consists of o...

Diversification is a strategic option that many managers use to improve their firms’ performance. This interdisciplinary research attempts to verify whether firm level diversification has any impact on performance. The study finds that on average, diversified firms show better performance compared to undiversified firms on both risk and return dimensions. It also tests the robustness of these r...