Bio
I am an Assistant Professor of Marketing at Bocconi University. I received my PhD in Marketing, with Distinction, from INSEAD and a PhD in Management from Sorbonne University. I also hold graduate degrees in Economics from Nova School of Business and Economics and Corvinus University of Budapest.
As an empirical researcher in marketing, I use causal inference and machine learning methods to study how consumers and firms respond to information, incentives, and market interventions. My research examines topics such as online reviews, product recalls, and platform-based status recognition. Some of my recent projects study product videos in e-commerce, advertising category expansion, policy interventions in digital markets, and interventions that encourage ethical behavior.
I received the 2021 Robert D. Buzzell Marketing Science Institute Best Paper Award for “The Impact of Negative Reviews on Online Search and Purchase Decisions.”
Research
Published papers
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Does fMRI Data Improve Predictions of Product Adoption by Store Managers and Sales per Store of Consumer Packaged Goods?
Journal of Marketing Research, forthcoming; with P. Albuquerque, A. Tusche, N. Gier, B. Weber, and H. Plassmann.
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The Impact of Negative Reviews on Online Search and Purchase Decisions
Journal of Marketing Research, 61(5), 2024; with P. Albuquerque.
Lead article. 2021 Robert D. Buzzell Marketing Science Institute Best Paper Award. Listed in SSRN's Top 10 downloads for the Marketing Science eJournal category.
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Effects of Geographical Accessibility on the Use of Outpatient Care Services: Quasi-Experimental Evidence from Panel Count Data
Health Economics, 24(9), 2015; with P. Elek and B. Varadi.
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The Effect of Education, Family Size, Unemployment and Childcare Availability on Birth Stopping and Timing
Portuguese Economic Journal, 13(2), 2014.
Selected for the Microeconometrics (2002-) collection in recognition of impact and lasting value.
Working papers
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How Does a Product's Recall Impact Its Retailer-Set Price?
Revise and resubmit at Management Science; with V. Astvansh, C. Hotz-Behofsits, and A. Borah.
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When Platforms Award Sellers: Evidence on Sellers' Pricing, Assortment, and Off-Platform Behavior
With S. Chang and S. Valentini.
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Mortality Salience's Effects on a Retailer's Product Prices and Portfolio Width
Reject and resubmit at International Journal of Research in Marketing; with V. Astvansh and A. Borah.
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How Researchers' Analytical Decisions Impact Brand Price Elasticity Estimates: Insights from A Many-Analyst Study
Koll et al. Invited submission to International Journal of Research in Marketing.
Work in progress
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Seeing is Selling? The Impact of Product Videos and AI Voiceovers on E-commerce Sales
With S. Chang. Data collection completed; initial analysis completed.
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The Effects of Expanding Advertising Categories: The Case of a Mobile Game Publisher
With K. Karimipour and A. Ordanini. Data collection completed; initial analysis completed.
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The Value of Product Attribute Information and Review Ratings in Online Consumer Search
With P. Albuquerque and N. Bertani. Data collection completed; modeling approach under development.
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Encouraging Ethical Behavior: Evidence from a Field Experiment
With H. Yoon. Data collection completed; initial analysis completed.
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Border Policy Beyond the Border: How Low-Value Import Duties Affect Digital Fashion Markets
With S. Chang, C. Hotz-Behofsits, and N. Wlömert. Data collection in progress.
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Communicating Success: Sporting Performance and Social Media Growth in Professional Tennis
With M. Beichert. Data collection in progress.