An application of the method of rank correlation is proposed for testing independence between a censored survival time and an ordinal covariate. The test statistic counts the number of concordances ...

Mitchell Grant is a self-taught investor with over 5 years of experience as a financial trader. He is a financial content strategist and creative content editor. Timothy Li is a consultant, accountant ...

Learn how depth of market (DOM) data reflects supply and demand in stocks, helping traders predict price directions and assess order impact.

Christopher Mims is a columnist who writes about technology for The Wall Street Journal's tech bureau in San Francisco. The subjects of his columns vary widely from one week to the next. He has ...