Leo Ahrens

@leoahrens.bsky.social

PolSci researcher at the Varieties of Egalitarianism project @EXCInequality. Politics of inequality, tax & welfare policies, public opinion, voting behavior. leoahrens.eu

What do you think about Achen/Bartel's Democracy for Realists? I really liked the book but its implications are dire for my research field (& my past research), which commonly relies on the "folk theory" of democracy

I got the comment "this study is not worthwhile because you cannot claim clausality from cross-sectional data" in a review. I'll share my response here. Unfortunately the reviewer dropped out of the pool - I am interested in what you think. Thread. polisky cpesky

I sent a 1000DPI file to the journal but the figure ends up looking like this in the pub (ok but not great). I only use pixelated images w/ opaque elements (eg the scatter points here). Why don't journal accept a vector file format that supports opacity, such as EMF?

Bild

I want to use an instrumental variable design but I have several IVs and not one. I read that this can lead to issues. How would I go about combining the IVs into one?

Here is a long thread about modelling clustered data, focusing on issues surrounding coefficient and standard error estimation and weighting. Let me know what you think. I would really like to know if my conclusions are correct because they often go against the grain in PolSci.

Happy to release new version of "Difference-in-Differences for Continuous Treatments and Instruments with Stayers", with Xavier, Félix, and Gonzalo. Yet another DID estimator? Yes, but this one handles treatments & IV continuously distributed at every period, like tariffs or taxes.

Difference-in-Differences for Continuous Treatments and Instruments with Stayers

We propose difference-in-differences estimators for continuous treatments with heterogeneous effects. We assume that between consecutive periods, the treatment

papers.ssrn.com

An update of ISOCODES is available Includes - various fixes to improve matching based on user feedback - improved notifications on fuzzy/failed/double matches to spot potential errors Install: net install isocodes, from("https://raw.githubusercontent.com/leojahrens/isocodes/master") replace

Leo Ahrens@leoahrens.bsky.social · 3y ago

I’m releasing ISOCODES, a new Stata package to generate standardized country code variables.   Feed in a string variable identifying countries and isocodes outputs numeric/2-3 letter codes (ISO3166) or full country names.   I’ll give you a short motivation and rundown below.

I’m releasing ISOCODES, a new Stata package to generate standardized country code variables.   Feed in a string variable identifying countries and isocodes outputs numeric/2-3 letter codes (ISO3166) or full country names.   I’ll give you a short motivation and rundown below.

I re-submitted an R&R some months ago and I can see in the online system that all reviews arrived about 5 weeks ago. Is it ever ok to get in touch in such a situation? I can only imagine the work load of an editor, but still. Touchy subject.