March 2006

Spring break, blog break

This week is spring break for both Harvard and MIT, so as per usual, we will be posting less this week. Enjoy the (sort of) spring sunshine!

Posted by Amy Perfors at March 27, 2006 6:00 AM

Control Groups for Breakfast, Revisited

A few months ago, I wrote an entry entitled The Value of Control Groups in Causal Inference (and Breakfast Cereal). It was a report on a fun experiment I did that worked well both in my daughter's kindergarten class and my graduate methods class at Harvard. There were a fair number of comments posted in the blog, and I also received dozens of other notes from parents and school teachers all over the country with many interesting questions and suggestions.

Valid Standard Errors for Propensity Score Matching, Anyone?

Jens Hainmueller

Propensity Score Matching (PSM) has become an increasingly popular method to estimate treatment effects in observational studies. Most papers that use PSM also provide standard errors for their treatment effect estimates. I always wonder where these standard errors actually come from. To my knowledge there still exists no method to calculate valid standard errors for PSM. What do you all think about this topic?

Applied Statistics - Jeff Gill

Today at noon, the Applied Statistics Workshop will present a talk by Jeff Gill of the Department of Political Science at the University of California at Davis. Professor Gill received his Ph.D from American University and served on the faculty at Cal Poly and the University of Florida before moving to Davis in 2004. His research focuses on the application of Bayesian methods and statistical computing to substantive questions in political science.

Incompatibility: Are You Worried?

Jim Greiner

I’m a teaching fellow for a course in missing data this semester, and one topic keeps coming up peripherally in the course, even though we haven’t tackled it head-on just yet. That topic is incompatible conditional distributions. And here’s my question for blog readers: how much does it bother you?

So You Want to Do a Survey?

"I'm doing a survey. I've never done this before, taken any classes on survey research, or read any books on the subject, and a friend suggested that I get some advice. Can you help me? I'm going in the field next week."