I’m late. I should have been telling you about this weeks ago, but I got behind on promotion and I got behind on email and honestly I got behind on a lot of things. But I’m not behind on excitement, and I refuse to let my tardiness rob you of what I think is going to be our best Codechella yet.
So here it is: the third annual Codechella Madrid runs May 25-28, 2026 at CUNEF Universidad in Madrid. Four days. Panel data, difference-in-differences, and synthetic control. Me and Kyle Butts teaching on panel data, Mark Anderson and Dan Rees teaching on practical side of publishing and navigating your career. And this year we’re upgrading with new material which I will be sharing in the weeks to come.
I’m going to be promoting Codechella every Monday from here on out. Each week I’ll share more about what we’re doing differently this year — how we’re improving the curriculum, what new material we’re adding, and why I think this edition will be meaningfully better than the first two. But today I just want to get the basics in front of you so you can start planning.
What It Is
Codechella is a four-day hands-on workshop on causal inference methods — specifically the difference-in-differences and synthetic control family of estimators— all of which have undergone considerable (and ongoing) updates over the last several years. This isn’t a conference where you sit and nod. We will share code and work through examples, as well as help everyone go deeper on these materials. Our goal is that everyone leaves with tools that can help them, and knowledge and understanding that makes them a better user of them as well.
I teach the difference-in-differences material — foundational and modern approaches appropriate to staggered treatment timing, covariate adjustment, as well as newer material like continuous diff-in-diff, compositional changes, pre-testing, power and more. Kyle Butts teaches synthetic control and advanced factor model methods. We go deep on both.
And one of the things I’m always excited about is the inclusion of Mark Anderson and Dan Rees who bring their hidden curriculum material on research paper writing and navigating academic careers. This is the stuff nobody teaches you in grad school — how to actually write and present empirical work. It’s invaluable and I’m thrilled they’re part of it again.
Pricing
Students: $220
Post-docs: $300
Faculty: $500
That’s four full days of instruction, morning coffee and pastries included. And if even those prices are a stretch — email me. We have promotional discounts available for students and post-docs but you have to email at causalinf@mixtape.consulting to get them. I want cost to be the last reason someone doesn’t come so please do come and participate. It’s a great chance to see a great place, eat great food, meet great people and learn great things.
The Details
Dates: May 25-28, 2026
Time: 9am - 5pm daily (with a 1.5-hour lunch break)
Location: Auditorium at CUNEF Universidad, Calle Almansa 101, Madrid
Getting there: Metro lines 6 and 7 stop about 300 meters from campus
Madrid in late May is beautiful. The weather is perfect, the city is alive, and CUNEF is a wonderful host institution. If you’ve never been to Madrid, this is your excuse to come — and you should come! We think it’s one of the best conferences you can attend, and since I didn’t teach any causal inference this semester on Mixtape Sessions, it’s a chance for you and everyone you love and cherish to come and learn it!
Hotels
A few recommendations near campus, all under or around €150/night:
VP Jardín Metropolitano (walking distance)
H10 Tribeca (walking distance)
AC Hotel Los Vascos by Marriott
NH Chamberí
Come
I’ll have more to say next Monday and every Monday after that about what’s new this year. But for now: save the dates, look at flights, and if you’re interested — or even just curious — email me at causalinf@mixtape.consulting. I have been behind on my emails but I will answer yours, and I’ll send you the promotional discount code.
I hope to see you in Madrid.