Introduction Random Effects (RE) versus Fixed Effects (FE) has a long and active debate history. More recently, a “Knapp–Hartung–like” version of FE—Unrestricted Weighted Least Squares (UWLS)—has entered the fray (Stanley & Doucouliagos, 2015 , 2016 ). UWLS is simply conventional weighted least squares using inverse sampling variance weights. It produces identical coefficient estimates to FE, albeit with different standard errors. Among these approaches, RE is by far the most widely used....

Introduction The list of guidelines and best-practice recommendations for meta-analysts is extensive. The Cochrane Handbook and a...

In this blog, I highlight a valid approach for calculating power after estimation—often called retrospective power. I provide a Shiny App...