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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html><head>
<!-- Google tag (gtag.js) -->
<script async src="https://www.googletagmanager.com/gtag/js?id=UA-174499109-1"></script>
<script>
window.dataLayer = window.dataLayer || [];
function gtag(){dataLayer.push(arguments);}
gtag('js', new Date());
gtag('config', 'UA-174499109-1');
</script>
<meta content="text/html; charset=ISO-88">
</head>
<body>
<div style="text-align: center;">
<h1><a class="mozTocH1" name="mozTocId352558"></a>Guy Aridor</h1>
<div style="text-align: left;">
<!--<h1><img style="border: 4px solid ; width: 360px; height: 372px; float: right;" alt="Photo of me" src="misleadinglyfancy.jpg"><br>
</h1>--->
<center>
<img src="img/Aridor_3.JPG" width="213" height="320"></img>
</center>
<br>
<big><big>About Me</big></big><br>
<br>
I am an Assistant Professor of Marketing at Northwestern Kellogg School of Management. I am mainly interested in understanding competition and regulatory issues in the digital economy as well as more broadly the societal impacts of digital technologies. My research uses tools from empirical industrial organization, experimental methodologies, and applied microeconomic theory in order to shed light on these questions. I am also affiliated with the CESifo Research Network.
<br><br>
Previously, I got my PhD in Economics at Columbia University and a B.A. in computer science, pure/applied mathematics, and economics from Boston University. Before my PhD I spent a couple of years as a software engineer at <a href="http://www.hubspot.com">HubSpot</a> where I worked on a bunch of fun stuff, including product experimentation tools and scaling products.
<br><br>
Links: <a href="files/cv.pdf">CV</a>, <a href="https://scholar.google.com/citations?user=ElO5aqEAAAAJ&hl=en#">Google Scholar</a>, <a href="https://github.com/rawls238">Github</a>
<hr>
<big><big>Working Papers</big></big>
<ol>
<li>Evaluating the Impact of Privacy Regulation on E-Commerce Firms: Evidence from Apple's App Tracking Transparency. Joint work with <a href="https://www.yeonkooche.com">Yeon-Koo Che</a>, <a href="https://bretthollenbeck.com">Brett Hollenbeck</a>, <a href="http://danielminhmccarthy.com">Daniel McCarthy</a>, <a href="https://www.bwl.uni-hamburg.de/en/mm/team/maximilian-kaiser.html">Maximilian Kaiser</a>.</li>
<ul>
<li><i>Revision Requested, Management Science</i></li>
<li><u>Full Paper</u>: <a href="files/att_paper.pdf">PDF</a>, <a href="https://papers.ssrn.com/sol3/papers.cfm?abstract_id=4698374">SSRN</a>, <a href="https://www.cesifo.org/en/publications/2024/working-paper/privacy-regulation-and-targeted-advertising-evidence-apples-app">CESifo</a>, Last Updated: December 2024</li>
</ul>
<li>The Informational Role of Online Recommendations: Evidence from a Field Experiment on MovieLens. Joint work with <a href="https://duartegoncalves.com">Duarte Goncalves</a>, <a href="http://www.ruoyankong.com">Ruoyan Kong</a>, <a href="https://cse.umn.edu/cs/daniel-kluver">Daniel Kluver</a>, <a href="http://konstan.umn.edu">Joseph Konstan</a>.</li>
<ul>
<li><u>Full Paper</u>: <a href="files/econ_of_recsys.pdf">PDF</a>, <a href="https://arxiv.org/abs/2211.14219">arXiv</a>, <a href="https://www.cesifo.org/en/publications/2022/working-paper/economics-recommender-systems-evidence-field-experiment-movielens">CESifo</a>, Last Updated: December 2024</li>
</ul>
</ol>
<big><big>Journal Publications</big></big>
<ol>
<li>Recommenders' Originals: The Welfare Effects of the Dual Role of Platforms as Producers and Recommender Systems. Joint work with <a href="https://duartegoncalves.com">Duarte Goncalves</a>.</li>
<ul>
<li><i>International Journal of Industrial Organization</i> (2022)</li>
<li><u>Full Paper</u>: <a href="files/recommender_originals.pdf">PDF</a>, <a href="https://www.sciencedirect.com/science/article/pii/S0167718722000212?via%3Dihub">Publisher Version</a></li>
</ul>
<li>The Effect of Privacy Regulation on the Data Industry: Empirical Evidence from GDPR. Joint work with <a href="https://www.yeonkooche.com">Yeon-Koo Che</a>, <a href="https://economics.mit.edu/faculty/tsalz">Tobias Salz</a>.</li>
<ul>
<li><i>RAND Journal of Economics</i> (2023)</li>
<li><u>Full Paper</u>: <a href="https://onlinelibrary.wiley.com/doi/10.1111/1756-2171.12455">Publisher Version</a></li>
</ul>
<li>Information-Constrained Coordination of Economic Behavior. Joint work with <a href="https://www.silveira-lab.com/rava-azeredo-da-silveira">Rava Azeredo da Silveira</a>, <a href="https://blogs.cuit.columbia.edu/mw2230/">Michael Woodford</a>.</li>
<ul>
<li><i>Journal of Economic Dynamics and Control</i> (2024, Special Issue)</li>
<li><u>Full paper</u>: <a href="https://www.sciencedirect.com/science/article/abs/pii/S0165188924001775">Publisher Version</a></li>
</ul>
<li>The Economics of Social Media. Joint work with <a href="https://www.rafaeljjd.com">Rafael Jimenez-Duran</a>, <a href="http://www.roeelevy.com">Ro'ee Levy</a>, <a href="https://www.songlena.com">Lena Song</a>.</li>
<ul>
<li><i>Journal of Economic Literature</i> (2024)</li>
<li><u>Full paper</u>: <a href="https://www.aeaweb.org/articles?id=10.1257/jel.20241743&from=f">Publisher Version</a>, <a href="files/econ_of_social_media.pdf">PDF</a>, <a href="https://papers.ssrn.com/sol3/papers.cfm?abstract_id=4708840">SSRN</a></li>
</ul>
<li>Competing Bandits: The Perils of Exploration under Competition. Joint work with <a href="https://www.tau.ac.il/~mansour/">Yishay Mansour</a>, <a href="https://www.microsoft.com/en-us/research/people/slivkins/">Alex Slivkins</a>, <a href="https://zstevenwu.com">Steven Wu</a>.</li>
<ul>
<li><i>ACM Transactions on Economics and Computation</i> (2025)</li>
<li><u>Full Paper</u>: <a href="https://dl.acm.org/doi/10.1145/3711831">Publisher Version</a></li>
</ul>
<li>Measuring Substitution Patterns in the Attention Economy: An Experimental Approach.</li>
<ul>
<li><i>RAND Journal of Economics</i> (Forthcoming)</li>
<li><u>Full paper</u>: <a href="files/jmp_latest.pdf">PDF</a></li>
</ul>
</ol>
<big><big>Peer-Reviewed Conference Proceedings</big></big>
<ol>
<li>The Perils of Exploration Under Competition: A Computational Modeling Approach. Joint work with Kevin Liu, <a href="https://www.microsoft.com/en-us/research/people/slivkins/">Alex Slivkins</a>, <a href="https://zstevenwu.com">Steven Wu</a>.</li>
<ul>
<li><i>Proceedings of the ACM Conference on Economics and Computation</i> (EC '19)</li>
<li><u>Extended Abstract</u>: <a href="https://dl.acm.org/doi/10.1145/3328526.3329635">Publisher Version</a>
</ul>
<li>Deconstructing the Filter Bubble: User Decision-Making and Recommender Systems. Joint work with <a href="https://duartegoncalves.com">Duarte Goncalves</a>, <a href="https://www.linkedin.com/in/shan-sikdar-0b53785a/">Shan Sikdar</a>.</li>
<ul>
<li><i>Proceedings of the 14th ACM Conference on Recommender Systems</i> (RecSys '20)</li>
<li><u>Full Paper</u>: <a href="https://dl.acm.org/doi/abs/10.1145/3383313.3412246">Publisher Version</a>
</ul>
<li>The Effect of Privacy Regulation on the Data Industry: Empirical Evidence from GDPR. Joint work with <a href="https://www.yeonkooche.com">Yeon-Koo Che</a>, <a href="https://economics.mit.edu/faculty/tsalz">Tobias Salz</a>.</li>
<ul>
<li><i>Proceedings of the ACM Conference on Economics and Computation</i> (EC '21)</li>
<li><u>Extended Abstract</u>: <a href="https://dl.acm.org/doi/abs/10.1145/3465456.3467543">Publisher Version</a>
</ul>
<li>Drivers of Digital Attention: Evidence from a Social Media Experiment.</li>
<ul>
<li><i>Proceedings of the ACM Conference on Economics and Computation</i> (EC '23)</li>
<li><u>Extended Abstract</u>: <a href="https://dl.acm.org/doi/10.1145/3580507.3597671">Publisher Version</a>
</ul>
<li>The Economics of Recommender Systems: Evidence from a Field Experiment on MovieLens. Joint work with <a href="https://duartegoncalves.com">Duarte Goncalves</a>, <a href="http://www.ruoyankong.com">Ruoyan Kong</a>, <a href="https://cse.umn.edu/cs/daniel-kluver">Daniel Kluver</a>, <a href="http://konstan.umn.edu">Joseph Konstan</a>.</li>
<ul>
<li><i>Proceedings of the ACM Conference on Economics and Computation</i> (EC '23)</li>
<li><u>Extended Abstract</u>: <a href="https://dl.acm.org/doi/10.1145/3580507.3597677">Publisher Version</a>
</ul>
<li> The MovieLens Beliefs Dataset: Collecting Pre-Choice Data for Online Recommender Systems. Joint work with <a href="https://duartegoncalves.com">Duarte Goncalves</a>, <a href="http://www.ruoyankong.com">Ruoyan Kong</a>, <a href="https://cse.umn.edu/cs/daniel-kluver">Daniel Kluver</a>, <a href="http://konstan.umn.edu">Joseph Konstan</a>.</li>
<ul>
<li><u>Best Short Paper at RecSys '24</u>, <u>Invited to Special Issue of ACM Transactions on Recommender Systems (declined)</u></li>
<li><i>Proceedings of the ACM Conference on Recommender Systems</i> (RecSys '24)</li>
<li><u>Full Paper</u>: <a href="https://dl.acm.org/doi/10.1145/3640457.3688158">Publisher Version</a></li>
</ul>
</ol>
<big><big>Work in Progress</big></big>
<ol>
<li>Does Transparency Matter in Opaque Product Markets? Insights from Privacy. Joint work with <a href="https://sites.google.com/view/samuelgoldberg">Sam Goldberg</a>.</li>
<li> (Dis)engagement with Politics: Evidence from Smartphone Content in the 2024 Elections. Joint work with <a href="https://www.rafaeljjd.com">Rafael Jimenez-Duran</a>, <a href="http://www.roeelevy.com">Ro'ee Levy</a>, <a href="https://www.songlena.com">Lena Song</a>.</li>
<li>Dynamic Assortment Optimization via Optimal Experimental Design. Joint work with <a href="https://www.linkedin.com/in/aurelien-bibaut">Aurelien Bibaut</a>, <a href="https://nathankallus.com">Nathan Kallus</a>.
</ol>
<big><big>Book Chapters </big></big>
<ol>
<li>Experiments on Social Media. Joint work with <a href="https://www.rafaeljjd.com">Rafael Jimenez-Duran</a>, <a href="http://www.roeelevy.com">Ro'ee Levy</a>, <a href="https://www.songlena.com">Lena Song</a>.</li>
<ul>
<li><u>Full paper:</u> <a href="files/handbook_social_media.pdf">PDF</a>, <a href="https://papers.ssrn.com/sol3/papers.cfm?abstract_id=4893781">SSRN</a>
<li>Prepared for <i>Handbook of Experimental Methods in the Social Sciences</i></li>
</ul>
</ol>
<div id ="software">
<big><big>Software</big></big><br>
<ul>
<li>RequestNow</li>
<ul>
<li><a href="https://www.requestnow.io">Website</a>, currently run by <a href="https://www.linkedin.com/in/mauerbac/">Matt Auerbach</a></li>
<li>Received pre-seed funding from <a href="https://www.roughdraft.vc">Rough Draft Ventures</a></li>
</ul>
<li>Front-end Product Experimentation Tools around <a href="https://github.com/facebookarchive/planout">PlanOut</a>:</li>
<ul>
<li><a href="https://product.hubspot.com/blog/product-experimentation-with-planout-and-react.js">Blog Post</a></li>
<li><a href="https://github.com/rawls238/PlanOut.js">PlanOut.js</a></li>
<li><a href="https://github.com/rawls238/react-experiments">react-experiments</a></li>
</ul>
<li><a href="https://github.com/rawls238/Scientist4J">Scientist4J</a>: A port of Github's Scientist refactoring tool in Java</li>
<ul>
<li>Example Usage: <a href="https://medium.com/turo-engineering/experimental-development-e5cb70638e64">1</a>, <a href="https://www.entrofi.net/githubs-scientist-as-a-helper-to-do-large-refactorings/">2</a>, <a href="https://medium.com/@MelvinBlokhuijzen/scientist-a-library-for-refactoring-critical-paths-8b9bcc854a11">3</a></li>
</ul>
</ul>
</div>
<big><big>Press, Blogs, and Other Mentions</big></big><br>
<ul>
<li>Privacy: <a href="https://marginalrevolution.com/marginalrevolution/2020/02/does-gdpr-even-boost-privacy.html">Marginal Revolution</a>, <a href="https://mitsloan.mit.edu/ideas-made-to-matter/a-twist-gdpr-made-some-user-data-more-valuable-to-marketers">MIT Sloan</a>, <a href="https://insight.kellogg.northwestern.edu/article/consumer-data-protection">Kellogg Insight</a>, <a href="https://www.msi.org/research-recap/is-apples-privacy-policy-taking-a-bite-out-of-business/">Marketing Science Institute</a>, <a href="https://insight.kellogg.northwestern.edu/article/online-consumer-privacy-advertising">Kellogg Insight</a>, <a href="https://www.welt.de/wirtschaft/article206068823/Google-Facebook-Co-EU-Datenschutz-staerkt-US-Techkonzerne.html">Welt (Germany)</a>, <a href="https://www.heise.de/hintergrund/Missing-Link-Wie-die-DSGVO-wirkt-schmutzige-Tricks-und-Macht-der-Staerkeren-4925977.html">Heise (Germany)</a>, <a href="https://exame.com/negocios/mundo-sem-cookies-as-big-techs-estao-se-adequando-a-uma-publicidade-online-com-mais-privacidade/amp/">Exame (Brazil)</a>, <a href="https://stratechery.com/2024/an-interview-with-eric-seufert-about-meta-at-the-top/">Stratechery</a>
<li>Social Media: <a href="https://insight.kellogg.northwestern.edu/article/favorite-app-attention-economy">Kellogg Insight</a>, <a href="https://cepr.org/voxeu/columns/economics-social-media">VoxEU</a>, <a href="https://www.forbesindia.com/article/kellogg-school-of-management/if-your-favorite-app-disappeared-how-would-you-spend-that-time/86285/1">Forbes India</a>, <a href="https://www1.folha.uol.com.br/colunas/bernardo-guimaraes/2024/04/devemos-regular-as-redes-sociais.shtml">Folha de Sao Paulo (Brazil)</a>
<li>RequestNow: <a href="https://www.bizjournals.com/boston/inno/stories/news/2013/04/04/make-sure-your-song-requests-never-go-unheard-at.html">Bostinno</a>, <a href="https://www.bostonglobe.com/business/2013/06/16/highlights-from-scott-kirsner-innovation-economy-blog/lOR9xJHh4duiTi0wcO76YJ/story.html">Boston Globe</a></li>
</ul>
<big><big>Miscellaneous</big></big>
<ul>
<li>Battlehack Hackathon Boston Winner / 3rd place World Finals</li>
<li>Nationality: Israel, United States</li>
</ul>
</div>
</div>
</body></html>