This study examines the ability of government bond fund managers to time the bond market, based on their monthly or quarterly holdings of Treasury securities during the period 1997-2006. We nd that, on average, government bond funds exhibit signi cantly positive timing ability at the one-month...

We study the dynamic relation between aggregate mutual fund flow and market-wide volatility. Using daily flow data and a VAR approach, we find that market volatility is negatively related to concurrent and lagged flow. A structural VAR impulse response analysis suggests that shock in flow has a...

Objectives This study examines the availability of electronic prescription and the utilization of e-prescribing by physicians in the US.Methods Nationally representative data from the 2004-2005 Community Tracking Study Physician Survey were used to identify which subgroups of physicians have...

Mutation operator is one of the mechanisms of evolutionary algorithms (EAs) and it can provide diversity in the search and help to explore the undiscovered search place. Quantum-behaved particle swarm optimization (QPSO), which is inspired by fundamental theory of PSO algorithm and quantum...

Derivative markets have exploded over the last decade, remained active in the midst of the 2007–2009 financial crisis and continue to be dominated by a small group of bank holding companies (BHC). BHC motives for derivative usage are usually tied to hedging purposes (balance sheet risk...

By using climate data in national stations in Xiji County, Ningxia during 1981 and 2020, a regression analysis was carried out on weather data in crop growth season in three automatic weather stations in Hulu River Valley. The results showed that celery belts of Hulu River Valley was divided...