The Lagrange Multiplier (LM) test is one of the principal tools to detect ARCH and GARCH effects in financial data analysis. However, when the underlying data are non-normal, which is often the case ...

The beta test is slated to start early next year, giving T-Mobile users the ability to send text messages in cellular dead zones by connecting to SpaceX's orbiting satellites. T-Mobile customers can ...

Five beta testers bring their iPhones and Galaxy devices to mobile dead zones in Alabama, Colorado, and other remote locales to try out texting on SpaceX's cellular Starlink service. For the first ...