Jeff Gortmaker
@jeffgortmaker.com
Postdoc at Princeton Econ in 2025
Assistant Professor at NYU Stern Econ in 2026
https://jeffgortmaker.com
https://x.com/jeff_gortmaker
Assistant Professor at NYU Stern Econ in 2026
https://jeffgortmaker.com
https://x.com/jeff_gortmaker
For a sense of what I'll be covering, check out the open source course materials. Problem sets quickly get you working with my and @cconlon.bsky.social’s PyBLP.
GitHub: github.com/Mixtape-Sess...
GitHub: github.com/Mixtape-Sess...
GitHub - Mixtape-Sessions/Demand-Estimation: Demand Estimation taught by Jeff Gortmaker and Ariel Pakes
Demand Estimation taught by Jeff Gortmaker and Ariel Pakes - Mixtape-Sessions/Demand-Estimation
github.com
October 15, 2025 at 8:15 PM
For a sense of what I'll be covering, check out the open source course materials. Problem sets quickly get you working with my and @cconlon.bsky.social’s PyBLP.
GitHub: github.com/Mixtape-Sess...
GitHub: github.com/Mixtape-Sess...
8/6 Oh and for anyone interested in a thread on the actual paper, #EconSky wasn't as much of a thing last year but here's my twitter thread: twitter.com/jeff_gortmak...
Jeff Gortmaker on X: "Hey #econtwitter, I'm excited to share a new WP with @conlon_chris about micro data (e.g. consumer surveys) in BLP estimation. Alongside it, we finally released PyBLP version 1.0! Paper: https://t.co/iRJkHs9f6V Code: https://t.co/JPMbDOCEWA Docs: https://t.co/cjVhiFunxR 1/16 https://t.co/lBbr1iY1Sg" / X
Hey #econtwitter, I'm excited to share a new WP with @conlon_chris about micro data (e.g. consumer surveys) in BLP estimation. Alongside it, we finally released PyBLP version 1.0! Paper: https://t.co/iRJkHs9f6V Code: https://t.co/JPMbDOCEWA Docs: https://t.co/cjVhiFunxR 1/16 https://t.co/lBbr1iY1Sg
twitter.com
November 29, 2024 at 4:38 PM
8/6 Oh and for anyone interested in a thread on the actual paper, #EconSky wasn't as much of a thing last year but here's my twitter thread: twitter.com/jeff_gortmak...
7/6 Also: I'm on the job market! If you're interested in the economics of (industrial policy for) open source or want to see a (very simple) example of PyBLP-powered micro BLP in action, check out my job market paper: bsky.app/profile/jeff...
Hey #EconSky, I'm on the job market with an #EconJMP about open source software. OSS is a global public good, widely used and provided by the private sector, but the target of recent industrial policy.
Paper: jeffgortmaker.com/files/Open_S...
1/
Paper: jeffgortmaker.com/files/Open_S...
1/
November 29, 2024 at 3:50 PM
7/6 Also: I'm on the job market! If you're interested in the economics of (industrial policy for) open source or want to see a (very simple) example of PyBLP-powered micro BLP in action, check out my job market paper: bsky.app/profile/jeff...
6/6 All this to say: if you're doing methods research, there are some clear private benefits that can come jointly with doing open source work (impact, transparency, networking, etc.) but also others that could be more surprising.
November 29, 2024 at 3:50 PM
6/6 All this to say: if you're doing methods research, there are some clear private benefits that can come jointly with doing open source work (impact, transparency, networking, etc.) but also others that could be more surprising.
5/6 Having an open source package lets you show students exactly how the method works with real-time examples. I used PyBLP to teach one of @causalinf.bsky.social @kylefbutts.bsky.social's Mixtape sessions (github.com/Mixtape-Sess...), which would have been far less accessible without it.
GitHub - Mixtape-Sessions/Demand-Estimation: Demand Estimation taught by Jeff Gortmaker and Ariel Pakes
Demand Estimation taught by Jeff Gortmaker and Ariel Pakes - Mixtape-Sessions/Demand-Estimation
github.com
November 29, 2024 at 3:50 PM
5/6 Having an open source package lets you show students exactly how the method works with real-time examples. I used PyBLP to teach one of @causalinf.bsky.social @kylefbutts.bsky.social's Mixtape sessions (github.com/Mixtape-Sess...), which would have been far less accessible without it.
4/6 When others rely on your code, you write more tests, which can benefit your (future) self. For every PyBLP version, I run ~2k tests across ~50 functions. These made it easy to broaden the scope of our papers by adding new simulations and empirical examples with confidence.
November 29, 2024 at 3:50 PM
4/6 When others rely on your code, you write more tests, which can benefit your (future) self. For every PyBLP version, I run ~2k tests across ~50 functions. These made it easy to broaden the scope of our papers by adding new simulations and empirical examples with confidence.
3/6 For micro BLP, I spent time iterating on PyBLP's interface to balance usability and flexibility. Feedback from users helped improve my design, which mapped directly into our standardized econometric framework, a key contribution of the 2nd paper.
November 29, 2024 at 3:50 PM
3/6 For micro BLP, I spent time iterating on PyBLP's interface to balance usability and flexibility. Feedback from users helped improve my design, which mapped directly into our standardized econometric framework, a key contribution of the 2nd paper.
2/6 I expected PyBLP's issue tracker (github.com/jeffgortmake...) to be mostly bug reports, but most are questions. Our 2nd paper was motivated by these interactions, and many of our explanations were informed by discussions on the tracker and emails from less vocal users.
November 29, 2024 at 3:50 PM
2/6 I expected PyBLP's issue tracker (github.com/jeffgortmake...) to be mostly bug reports, but most are questions. Our 2nd paper was motivated by these interactions, and many of our explanations were informed by discussions on the tracker and emails from less vocal users.
I’m curious whether DeFi legality affects contributions. And time zone would for sure be a useful predictor! (It’s for sure at least somewhat predictive of country on GitHub.) Useful to hear that there’s probably no low hanging fruit for wallet geocoding - thanks.
November 20, 2024 at 1:44 AM
I’m curious whether DeFi legality affects contributions. And time zone would for sure be a useful predictor! (It’s for sure at least somewhat predictive of country on GitHub.) Useful to hear that there’s probably no low hanging fruit for wallet geocoding - thanks.
Legality of geocoding wallets? Makes sense. Best public data I could find from a quick search is a coarse proxy involving web traffic (documents1.worldbank.org/curated/en/7...).
November 19, 2024 at 10:38 PM
Legality of geocoding wallets? Makes sense. Best public data I could find from a quick search is a coarse proxy involving web traffic (documents1.worldbank.org/curated/en/7...).
Thanks, Gina! Given your research, I'm curious if you think some comparable spillover stats could be measured for crypto OSS at the country level? E.g., comparing crypto GitHub contributions by country to transaction volumes for geocode-able (?) wallets?
November 19, 2024 at 2:46 PM
Thanks, Gina! Given your research, I'm curious if you think some comparable spillover stats could be measured for crypto OSS at the country level? E.g., comparing crypto GitHub contributions by country to transaction volumes for geocode-able (?) wallets?
Probably a lot of the questions are the same! A big thing that's changed is the increasing availability of incredible datasets like www.gharchive.org and innovationgraph.github.com
GH Archive
GH Archive is a project to record the public GitHub timeline, archive it, and make it easily accessible for further analysis.
www.gharchive.org
November 18, 2024 at 11:16 PM
Probably a lot of the questions are the same! A big thing that's changed is the increasing availability of incredible datasets like www.gharchive.org and innovationgraph.github.com