RCS would like to congratulate class of 2019 graduates and those who are departing for new opportunities! In anticipation of your departure from HBS, we'd like to bring to your attention the following RCS-related departure checklist that may require action on your part before losing access to HBS resources on June 30^th....

This month's tip is by our Senior Statistician, Xiang Ao: 

Stata’s margins command has been a powerful tool for many economists. It can calculate predicted means as well as predicted marginal effects. Sometimes we’d like to compare those marginal effects. People use margins and marginsplot to generate marginal effects; then draw conclusions on whether there is a difference between marginal effects, based on whether the confidence intervals overlap or not. However, that can actually be wrong. In this post, I’d like to introduce a way to...

Over the past few weeks, you may have noticed that the RCS intranet has received a facelift! In addition to restructuring content, the updated page includes several new features that we hope will streamline users’ experiences. In particular, we now offer forms that allow users to:

• request new project spaces,...

We are often asked about how to calculate marginal effects in R, especially from Stata users who use Stata's margins and marginsplot commands after regression models. These two packages in R have similar functions to Stata's margins and marginsplot commands, which are used to calculate marginal effects after a regression model and graph them: 

ggeffects

...