iiinova — where your digital self keeps evolving

Matt Webb @mattdwebb.bsky.social · 13/03/2026

⏳ Only 2 days left! The submission deadline for the James MacKinnon 75th Birthday Conference is this Sunday, March 15. A great chance to celebrate his monumental impact on econometrics, from bootstrap inference to non-nested hypothesis testing. Submit: editorialexpress.com/cgi-bin/conf... 🧵

editorialexpress.com

If you don't have an account:

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Matt Webb @mattdwebb.bsky.social · 12/09/2025

Looking forward to Celebrating @James MacKinnon next week in Kingston. Friday, September 12th is the last day to register, you can do that here: events.fin.queensu.ca/cgi/registra... The program is available here: docs.google.com/document/d/1... Hope to see you there. 1/2

events.fin.queensu.ca

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Matt Webb @mattdwebb.bsky.social · 06/06/2025

Excited to be a part of a special issue of the Canadian Journal of Economics in honour of James MacKinnon, this complements the conference being held in Kingston on September 18-19. Please consider submitting your papers to both the conference and the special issue. 1/3

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Matt Webb @mattdwebb.bsky.social · 27/05/2025

Excited to open the call for papers for the 40th Canadian Econometric Study Group (CESG) conference. The conference will be in Ottawa from October 17 to October 19, this year's theme is `Credible Econometrics'. For more details, see caneconometrics.ca/annualMeetin... #econtwitter #cdnecon

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Matt Webb @mattdwebb.bsky.social · 14/05/2025

I'm thrilled that our boottest article recently surpassed 1000 citations. This is beyond what we ever expected. To celebrate, I’ll highlight two new features added since the article was published. The first concerns speed, the second reliability. #econTwitter 1/4

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Matt Webb @mattdwebb.bsky.social · 29/04/2025

TFW you threaten to fire the Governor of the Bank of Canada and a former Governor takes your job.

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Matt Webb @mattdwebb.bsky.social · 04/04/2025

Are you going to the CEA 2025 conference in Montreal? Do you play hockey? Lanny Zrill and I are organizing the second annual ice hockey game. The game takes place on Thursday, May 29th from 17h00-17h50. To join us please email ceahockey@gmail.com for more details. #cdnecon #econtwitter

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Reposted by Matt Webb

Nick Huntington-Klein @nickchk.com · 01/04/2025

The second edition of The Effect is now available for preorder! This version has a whole new chapter on Partial Identification, a considerable update on staggered treatment and control variables in DID, and zillions of other little updates throughout. www.routledge.com/The-Effect-A...

routledge.com

The Effect: An Introduction to Research Design and Causality

The Effect: An Introduction to Research Design and Causality, Second edition is about research design, specifically concerning research that uses observational data to make a causal inference. It is s...

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Matt Webb @mattdwebb.bsky.social · 15/01/2025

Skated to work today for the first time since the pandemic.

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Matt Webb @mattdwebb.bsky.social · 20/12/2024

Excited to share my latest work with @sunnykarimcu.bsky.social on Difference-in-Differences with time-varying covariates. We introduce the common causal covariates (CCC) assumption and show how its violation biases DiD estimators. Check it out! arxiv.org/abs/2412.14447 1/5

arxiv.org

Good Controls Gone Bad: Difference-in-Differences with Covariates

This paper introduces the two-way common causal covariates (CCC) assumption, which is necessary to get an unbiased estimate of the ATT when using time-varying covariates in existing Difference-in-Diff...

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Matt Webb @mattdwebb.bsky.social · 07/12/2024

The Canadian government recently expanded the list of banned firearms. Do municipalities with more licensed firearm owners, or registered firearms, experience more firearm deaths or crimes? Essentially, no. See our recent paper here: github.com/mattdwebb/CD... #cdnpoli 1/

github.com

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Matt Webb @mattdwebb.bsky.social · 19/11/2024

Welcome to all my new followers. I suspect many of you will be underwhelmed by my irregular posts about hypothesis testing and causal inference.

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Matt Webb @mattdwebb.bsky.social · 13/11/2024

After nearly two years of working with chatGPT I'm still in awe. A quick thread of capabilities I've found useful for teaching and research. Converting photos of (poorly) handwritten notes into beamer slides:

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Clément de Chaisemartin @cdechaisemartin.bsky.social · 14/12/2023

So excited to announce that our textbook with Xavier, "Difference-in-Differences for Simple and Complex Natural Experiments", is now under contract with Princeton University Press. Check out the "working textbook" version here! Comments welcome! papers.ssrn.com/sol3/papers....

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Grant McDermott @gmcd.bsky.social · 29/11/2023

100x performance improvement for the Callaway-Sant'Anna DiD estimator. Super impressive. github.com/TsaiLintung/... #EconSky

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