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<div class="container">
<header>
<h1 class="name">Tilman Drerup</h1>
<p class="title">Economics & Machine Learning</p>
<div class="contact">
<a href="https://www.linkedin.com/in/tilman-drerup-1661a810b/">LinkedIn</a> •
<a href="https://github.com/tdrerup">GitHub</a> •
<a href="https://scholar.google.com/citations?user=AeNZXSEAAAAJ&hl=en">Google Scholar</a>
</div>
</header>
<nav>
<div class="nav-links">
<a href="#" class="nav-link active" onclick="showSection('about')">About</a>
<a href="#" class="nav-link" onclick="showSection('research')">Research</a>
<a href="#" class="nav-link" onclick="showSection('blog')">Blog</a>
<a href="#" class="nav-link" onclick="showSection('projects')">Projects</a>
<a href="#" class="nav-link" onclick="showSection('cv')">CV</a>
</div>
</nav>
<main>
<section id="about" class="section active">
<h2>Hi there!</h2>
<img src="economics_and_machine_learning.png" alt="Economics and Machine Learning" class="about-image">
<p>I am a Senior Director of Machine Learning Engineering at Instacart in San Francisco, California. Working at the intersection of economics and machine learning, my team and I tackle a diverse set of topics, including ads, pricing, and growth.</p>
<p>You can contact me through <a href="https://www.linkedin.com/in/tilman-drerup-1661a810b/">LinkedIn</a>.</p>
</section>
<section id="research" class="section">
<h2>Selected Papers</h2>
<p>I have worked as a postdoctoral researcher in economics at <a href="http://siepr.stanford.edu/" target="_blank">Stanford University</a> under the supervision of Prof. Susan Athey and as a postdoctoral researcher at the <a href="https://www.iame.uni-bonn.de/" target="_blank">Bonn Institute for Applied Microeconomics</a>.</p>
<p>My research focuses on applied microeconometrics, machine learning, and behavioral finance, with particular emphasis on user heterogeneity, dimension reduction in choice models, and the estimation of price elasticities. I am also interested in the role of beliefs and non-standard choice behavior in financial decision making.</p>
<h3>Selected Papers</h3>
<div class="research-item">
<div class="research-title">Designing Promises with Reference-Dependent Customers: The Case of Online Grocery Delivery Time</div>
<div class="research-meta">2022 • with George Gui (Columbia) • <a href="https://papers.ssrn.com/sol3/papers.cfm?abstract_id=4298782" target="_blank">SSRN</a></div>
</div>
<div class="research-item">
<div class="research-title">Skewness Expectations and Portfolio Choice</div>
<div class="research-meta">2023 • with Matthias Wibral (Maastricht) and Christian Zimpelmann (Bonn) • <a href="https://link.springer.com/article/10.1007/s10683-022-09780-9" target="_blank">Journal of Experimental Economics</a></div>
</div>
<div class="research-item">
<div class="research-title">Eliciting Subjective Expectations for Bivariate Outcomes</div>
<div class="research-meta">2019 • <a href="https://doi.org/10.1016/j.jbef.2019.05.002" target="_blank">Journal of Behavioral and Experimental Finance</a></div>
</div>
<div class="research-item">
<div class="research-title">The Precision of Subjective Data and the Explanatory Power of Economic Models</div>
<div class="research-meta">2017 • with Benjamin Enke (Harvard) and Hans-Martin von Gaudecker (Bonn) • <a href="https://doi.org/10.1016/j.jeconom.2017.06.017" target="_blank">Journal of Econometrics</a></div>
</div>
<div class="research-item">
<div class="research-title">Diurnal Rhythms in Investor Sentiment</div>
<div class="research-meta">2015 • <a href="https://doi.org/10.1016/j.jbef.2015.07.002" target="_blank">Journal of Behavioral and Experimental Finance</a></div>
</div>
<div class="research-item">
<div class="research-title">Recommendation Revisions and Differences in the Interpretation of Earnings</div>
<div class="research-meta">2014 • <a href="https://papers.ssrn.com/sol3/papers.cfm?abstract_id=2188359" target="_blank">SSRN</a></div>
</div>
<div class="research-item">
<div class="research-title">Long-Term Effects of Hedge Fund Activism in Germany</div>
<div class="research-meta">2014 • <a href="https://papers.ssrn.com/sol3/papers.cfm?abstract_id=1718365" target="_blank">SSRN</a></div>
</div>
<h3>Selected Patents (Granted)</h3>
<div class="research-item">
<div class="research-title">Generative Model for Item Image Selection</div>
<div class="research-meta">2026 • <a href="https://patents.google.com/patent/US12530819" target="_blank">Link</a></div>
</div>
<div class="research-item">
<div class="research-title">Dynamic Service Quality Adjustments Based on Causal Estimates of Service Quality Sensitivity</div>
<div class="research-meta">2026 • <a href="https://patents.google.com/patent/US12536571B2/en" target="_blank">Link</a></div>
</div>
<div class="research-item">
<div class="research-title">Counterfactual Policy Evaluation of Model Performance</div>
<div class="research-meta">2025 • <a href="https://patents.google.com/patent/US20240220859A1/en" target="_blank">Link</a></div>
</div>
<div class="research-item">
<div class="research-title">AI Agent-Driven Interaction Model for Applications</div>
<div class="research-meta">2025 • <a href="https://patents.google.com/patent/US12487857B1/en" target="_blank">Link</a></div>
</div>
<div class="research-item">
<div class="research-title">Ranking Search Results Based on Appeasement Signals and Query Specificity</div>
<div class="research-meta">2025 • <a href="https://patents.google.com/patent/US12488009B2/en" target="_blank">Link</a></div>
</div>
<div class="research-item">
<div class="research-title">Automated Policy Function Adjustment Using Reinforcement Learning Algorithm</div>
<div class="research-meta">2025 • <a href="https://patents.google.com/patent/US20230298080A1/en" target="_blank">Link</a></div>
</div>
<div class="research-item">
<div class="research-title">Counterfactual Evaluation of Policies for Categories of Items Using Machine Learning Prediction of Outcomes</div>
<div class="research-meta">2025 • <a href="https://patents.google.com/patent/US12361361B2/en" target="_blank">Link</a></div>
</div>
<div class="research-item">
<div class="research-title">Trustless Physical Cryptocurrency</div>
<div class="research-meta">2021 • <a href="https://patents.google.com/patent/US10896412B2/en" target="_blank">Link</a></div>
</div>
</section>
<section id="projects" class="section">
<h2>Projects</h2>
<h3>Selected Software Projects</h3>
<div class="project-item">
<div class="project-title">Elliptic Curve Solidity</div>
<div class="project-details"><a href="https://github.com/tdrerup/elliptic-curve-solidity" target="_blank">GitHub</a></div>
<div class="project-description">A JavaScript/Solidity implementation of elliptic curve math, parameterized for ECDSA signature verification for curve secp256r1/prime256v1/p256 on Ethereum.</div>
</div>
<div class="project-item">
<div class="project-title">Binary Choice Double Index</div>
<div class="project-details"><a href="https://github.com/tdrerup/binary_choice_double_index" target="_blank">GitHub</a></div>
<div class="project-description">A Python implementation of the semiparametric double-index estimator of Klein and Vella (2009).</div>
</div>
<div class="project-item">
<div class="project-title">KONG.CASH Mobile App</div>
<div class="project-details"><a href="https://apps.apple.com/app/id1479791375" target="_blank">App Store</a></div>
<div class="project-description">Mobile app for verifying physical crypto notes using smart contracts, elliptic curve math, and NFC.</div>
</div>
</section>
<section id="blog" class="section">
<h2>Blog</h2>
<p>Once in a while, I blog about some of my team's work the intersection of economics and machine learning.</p>
<h3>Recent Posts</h3>
<div class="update-item">
<div class="update-date">June 2024</div>
<div class="update-description">Toban Wiebe, Fang Guo, Rustin Partow, and I have written a <a href="https://medium.com/tech-at-instacart/bandits-for-marketing-optimization-f5a63b9bfaa7" target="_blank">blog post</a> on some recent work we have done to optimally allocate marketing spend via adaptive experimentation.</div>
</div>
<div class="update-item">
<div class="update-date">April 2024</div>
<div class="update-description">Levi Boxell, Robert Fletcher, and I have written a <a href="https://tech.instacart.com/optimizing-at-the-edge-using-regression-discontinuity-designs-to-power-decision-making-51e296615046" target="_blank">blog post</a> on using regression discontinuities to power decision-making. Check it out!</div>
</div>
<div class="update-item">
<div class="update-date">November 2023</div>
<div class="update-description">Levi Boxell, Robert Fletcher, and I have written a <a href="https://tech.instacart.com/the-economics-team-at-instacart-94c48db951e8" target="_blank">blog post</a> to describe the kind of work that Instacart's Economics team is working on and the tools and skills we deploy.</div>
</div>
</section>
<section id="cv" class="section">
<h2>CV</h2>
<div class="cv-section">
<h3>Experience</h3>
<div class="cv-item">
<div class="cv-item-title">Instacart</div>
<div class="cv-item-details">Since 2024 • Senior Director of Machine Learning Engineering</div>
<div class="cv-item-details">2022-2024 • Director of Machine Learning Engineering</div>
<div class="cv-item-details">2020-2022 • Senior Manager of Machine Learning Engineering</div>
<div class="cv-item-details">2020-2020 • Staff Economist / Machine Learning Engineer</div>
</div>
<div class="cv-item">
<div class="cv-item-title">WeWork</div>
<div class="cv-item-details">2019-2020 • Senior Economist</div>
</div>
<div class="cv-item">
<div class="cv-item-title">Airtime Network</div>
<div class="cv-item-details">2018-2019 • Co-Founder</div>
</div>
<div class="cv-item">
<div class="cv-item-title">Stanford University</div>
<div class="cv-item-details">2016-2017 • Postdoctoral Researcher in Economics under the supervision of Prof. Susan Athey</div>
</div>
<div class="cv-item">
<div class="cv-item-title">Bonn University</div>
<div class="cv-item-details">2013-2016 • (Postdoctoral) Researcher in Economics</div>
</div>
<div class="cv-item">
<div class="cv-item-title">Gameconomy GmbH</div>
<div class="cv-item-details">2002-2006 • Founder / CEO</div>
</div>
<h3>Education</h3>
<div class="cv-item">
<div class="cv-item-title">University of Bonn</div>
<div class="cv-item-details">2015 • Ph.D. in Economics</div>
<div class="cv-item-details">2009 • Diploma in Economics</div>
</div>
</div>
</section>
</main>
</div>
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