We develop methods of nonparametric estimation for the Expected Shortfall of possibly heavy tailed asset returns that leads to asymptotically standard inference. We use a tail-trimming indicator to dampen extremes negligibly, ensuring standard Gaussian inference, and a higher rate of convergence than without trimming when the variance is infinite. Trimming, however, causes bias in small sample…

We investigate the capability of Time Reversal Mirror (TRM) algorithm to image local acoustic sources (<3.5 km) associated with complex, sustained volcanic eruptions. Accurate source localization for volcano infrasound (low-frequency acoustic waves) is often challenging due to pronounced volcanic topography and emergent arrivals of infrasound signals. While the accuracy of the conventional app…

The long and complex history of southern Africa makes it a geological nexus for understanding how crust forms, evolves and survives plate tectonic processes over billions of years. The goal of this study is to characterize the crustal thickness, composition, and Mohoimpedance contrasts across the Kaapvaal and Zimbabwe Cratons and surrounding mobile belts, which range in age from Archean to Pala…

Hamilton’s theory of kin selection is the best-known framework for understanding the evolution of social behavior but has long been a source of controversy in evolutionary biology. A recent critique of the theory by Nowak, Tarnita, and Wilson sparked a new round of debate, which shows no signs of abating. In this overview, we highlight a number of conceptual issues that lie at the heart of th…

Pharmacy benefit managers (PBMs) potentially lower costs associated with prescription drugs through increased bargaining power with manufacturers. PBMs engage in selective contracting with pharmacies which has the potential to reduce retail competition, leading to increased prices. Proponents of �Any Willing Provider (AWP)� and �Freedom of Choice (FOC)� laws limiting this s…

Tahun Terbit

2011

Tahun Terbit

2012

Tahun Terbit

2013

Tahun Terbit

2014

Tahun Terbit

2009