Marketing Professor @ImperialBiz
Joined June 2012
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Pinned Tweet
Our paper on "Demand Estimation with Text and Image Data", joint work with Giovanni Compiani (@GioCompiani) and Ilya Morozov, is now forthcoming at the RAND Journal of Economics.
papers.ssrn.com/sol3/papers.…
In the paper we extract product features from unstructured ... [1/4]
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Stephan Seiler retweeted
Now available online at #QME:
"Going back to move forward? How search revisits on a website we built inform us about search outcomes"
by Ivy Chu Dang, Raluca Mihaela Ursu (@ralucamursu) and Pradeep Chintagunta.
link.springer.com/article/10…
The paper describes how [...]
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Stephan Seiler retweeted
Mar 26
GLP-1 drugs are the ultimate validation of the techno-solutionist approach to society's most challenging problems.
The obesity crisis seemed liked it would just get worse and worse forever. Scolding from public health officials didn't work. Proposals to completely overhaul our food systems were dead on arrival.
Instead, we invented a weekly shot (based on Gila monster venom!) that fixes obesity directly.
And now, thanks to the economic incentives in our biomedical industry, we have follow-on drugs that will be cheaper, even more effective, and easier to administer (by taking a pill instead of a shot).
Policymakers should be focused on figuring out how we can get more breakthrough drugs like GLP-1s (and faster). They also should think hard about which slopulist ideas might inadvertently kill the goose that lays the golden eggs.
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Stephan Seiler retweeted
Now available online at @QME_Journal : "Bayesian learning and skill accumulation in video game play" by Jiarui Liu, Charles Zou, and @pra_chintagunta.
link.springer.com/article/10…
The paper analyzes the drivers of player engagement on a video game platform. [...]
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Stephan Seiler retweeted
Mar 27
YES!
I'll just add that the system *can* work this way *right now* without reform. An editor just must be willing to try and the referees need to say yes.
And in my experience trying this exact thing, it's hard to get the referees to agree to have their words made public...
Mar 27
How I would reform the system:
1. Referees make suggestions. 2. Author revises however they want.
3. Ed makes a final decision, and the referees write the limitations section together.
It’s win win, the authors publish the paper they want, the readers get to see a high quality critique that is normally hidden. Yes the reader has to think for themselves, this is a good thing, we shouldn’t treat articles as sacred texts.
It’s good for science too bc it generates ideas for future authors on how to fill the holes, test the weak assumptions etc.
There’s so much excellent knowledge generated in the conversation between authors and referees and it is all buried and forgotten when the paper is published.
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Stephan Seiler retweeted
Now available online at Quantitative Marketing and Economics:
"Incorporating switching reasons into a factor-analytic choice model: A study on benefit segmentation of physicians"
by Sangwoo Shin, Qiang Liu, Siyun Lu, and Paul Nelson
link.springer.com/article/10…
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Our paper on "Demand Estimation with Text and Image Data", joint work with Giovanni Compiani (@GioCompiani) and Ilya Morozov, is now forthcoming at the RAND Journal of Economics.
papers.ssrn.com/sol3/papers.…
In the paper we extract product features from unstructured ... [1/4]
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... and consistently predicts substitution patterns in real-world data across 40 product categories.
Our approach enables demand estimation even when researchers lack data on product attributes or when consumers value hard-to-quantify attributes such as visual design. [3/4]
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The approach is easily scalable across categories because it does not require category-specific inputs (contrary to characteristics-based approaches). We make our code publicly available here: github.com/deep-logit-demand… [4/4]
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Stephan Seiler retweeted
Now available online at #QME: "Affirmative action as a cost cutting tool in procurement markets" by Simha Mummalaneni.
link.springer.com/article/10…
The paper highlight an important positive side-effect of affirmative action on market outcomes. [...]
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Stephan Seiler retweeted
Feb 13
The 2026 Workshop on Platform Analytics (WoPA) program and registration are now live! lnkd.in/gipaU4uk
This will be the 4th edition of the workshop, and we are looking forward to welcoming you to San Diego on April 24-25, 2026, at the University of California, San Diego - Rady School of Management. We’re excited about the lineup of papers, and grateful to all the program committee members who reviewed submissions.
Please share this post with anyone who works on platforms!
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Feb 11
I have a new paper. We look at ~all stats articles in political science post-2010 & show that 94% have abstracts that claim to reject a null. Only 2% present only null results. This is hard to explain unless the research process has a filter that only lets rejections through.
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Stephan Seiler retweeted
Feb 6
Remember when Milton Friedman would go around and explain basic economic principles clearly and broadly to the public? We need more of that.
Otherwise we're left with public intellectuals who talk about economics for *decades* without knowing even the basics.
@R_Thaler doing great work pushing back, but wow.
Feb 6
Listening through the full Jon Stewart interview, this specific section was pretty shocking to hear. Stewart doesn't know that:
1) Economics both predicts people's behavior in response to taxes, and recommends taxes to deal with externalities.
2) Economics as a discipline doesn't say "We as economists should exclusively facilitate corporations maximizing shareholder value." He acts shocked and skeptical when Thaler says that economics is about maximizing the public's welfare. He disagrees with Thaler and says "The goal of economics in a capitalist system is to make the most amount of money for your shareholders. Since when is economics about improving the human condition?"
3) Economics isn't synonymous with "completely free markets with no taxes."
I don't know how you spend 20 years publicly commenting on politics 5 nights a week without at least bothering to learn this. Shows a pretty shocking lack of curiosity.
youtu.be/rZczEzMu_U8?si=FM1z…
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4 Nov 2025
Lawsuit ads warn viewers about alleged risks of specific prescription drugs and encourage them to join potential lawsuits. In my paper, now available online at Management Science, I study how such drug injury ads affect drug use and health outcomes.
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Jan 31
🚨Call for papers 🚨 for the BSE Summer Forum: Quantitative Marketing Workshop in Barcelona June 8-9th.
Submission from all areas of quant marketing are welcome.
Link to the workshop webpage and submission form: bse.eu/workshop/quantitative…
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Stephan Seiler retweeted
Jan 27
📢now forthcoming in ECMA!
The Class Gap in Career Progression: Evidence from US Academia
Class is rarely a focus of research or DEI in elite US occupations.
Evidence suggests it should be: we find a large class gap in at least one occupation - tenure-track academia...🧵
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Stephan Seiler retweeted
Worth watching. Harsh but fair
Jan 11
Why has the global Left swallowed glue about #IranProtests?
A young Iranian 🇮🇷 woman bluntly and brilliantly explains the Left’s brazen dishonesty.
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31 Dec 2025
Following my 🎅 Xmas🎅 tradition, here are some of my favorite quant marketing papers of 2025.
1) Measuring consumer sensitivity to audio advertising: a long-run field experiment on Pandora internet radio by @GoliAlii, Jason Huang, @david_reiley, Nickolai Riabov in QME ...
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31 Dec 2025
Firms are assigned to control, high or low intensity feedback soliciting and then customers are also assigned to whether they are tapped for feedback. This allows the authors to study the impact of feedback on the tapped customer directly and on subsequent improvements in [...]
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31 Dec 2025
firm behavior which also affects untapped customers. The study finds support for both customer- and firm-side effects of feedback.
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