We are excited to announce the latest major release of rIP (v1.2.0), which is an R package that detects fraud in online surveys by tracing, scoring, and visualizing IP addresses. Essentially, rIP takes an array of IP addresses, which are always captured in online surveys (e.g., MTurk), and the ...

The Herfindahl-Hirschman Index (HHI) is a widely used measure of concentration in a variety of fields including, business, economics, political science, finance, and many others. Though simple to calculate (summed squared market shares of firms/actors in a single market/space), calculation of the HHI can get onerous, especially as ...

A Simple Method for Purging Mediation Effects among Independent Variables Mediation can occur when one independent variable swamps the effect of another, suggesting high correlation between the two variables. Though there are some great packages for mediation analysis out there, the simple intuition of its need is often ambiguous, especially ...