Expectiles are a coherent and elicitable alternative to commonly used market risk measures, but practical backtesting tools have lagged behind. This study proposes new backtests that separate unconditional coverage from independence in expectile forecasts. By connecting a Wald-testing framework to Box–Pierce-style autocorrelation testing under a location-scale setting, the authors develop tests with improved finite-sample behavior in simulations and demonstrate their use on S&P 500 return data.

In a pragmatic cluster non-randomized trial, Alexandra Kulinkina and colleagues investigate the effectiveness of a clinical decision support algorithm for guiding antibiotic prescribing in pediatric outpatient care in Rwanda.

Gold nanoparticles with surface functionalization are vital to improve their stability, bio-compatibility to engineer them to be suitable candidates in advanced bio-medical technologies, including drug delivery systems, biosensors, bioimaging, photothermal cancer therapy etc.  They are also being exploited in catalysis and energy applications. Their performance in these applications depends strongly on how their surfaces interact with the surrounding medium, particularly the interfacial water, at the nanoscale. Therefore, understanding the thermodynamics and intermolecular structure of the interfacial water is crucial in the design process.