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Areas of Expertise (3)

Judgment and Decision Making

Consumer Behavior

Decision Making Under Uncertainty


Celia Gaertig studies the psychology of consumer behavior and decision making. Much of her work focuses on understanding how consumers make judgments and decisions in situations that involve uncertainty.

Many of our most common and important decisions, from home purchases to investment decisions, involve uncertainty. Gaertig’s work challenges long-held beliefs about how uncertainty affects consumers’ judgments. In one line of investigation, Gaertig explores preferences for advice. There is a widespread belief that advisees prefer advisors who offer certainty, even for events that are inherently uncertain. In contrast, her research shows that consumers do not dislike, and sometimes prefer, uncertain advice. In related work, Gaertig shows why consumers may prefer an uncertain price promotion, such as a 10% chance to get a product for free, to an equivalent sure discount, and delineates the circumstances under which such uncertain promotions are effective.

Her research has been published in Psychological Science, Management Science, PNAS, and the Journal of Experimental Social Psychology.

Gaertig earned a PhD from the Wharton School, University of Pennsylvania. She also completed a BSc in Psychology (University of Freiburg) and a BA in Business (DHBW Karlsruhe), both in Germany.

Education (3)

The Wharton School, University of Pennsylvania: PhD, Decision Processes

University of Freiburg: BSc, Psychology

DHBW Karlsruhe: BA, Business

Honors & Awards (5)

Runner Up, Hillel Einhorn New Investigator Award, Society for Judgment and Decision Making


Winkelman Fellowship Grant, The Wharton School

2016 - 2019

Wharton Risk Center Russell Ackoff Doctoral Student Fellowship Award

2015 - 2019

Paul R. Kleindorfer Scholar Award


Marjorie Weiler Prize for Excellence in Writing


Selected External Service & Affiliations (2)

  • Ad hoc Reviewer: Journal of Experimental Psychology: General, Journal of Experimental Social Psychology, Journal of Marketing Research, Judgment and Decision Making, Management Science, Organizational Behavioral and Human Decision Processes, Social Psychological and Personality Science
  • Conference Reviewer: Behavioral Decision Research and Management (BDRM), Society for Judgment and Decision Making (SJDM), Society of Consumer Psychology (SCP)

Positions Held (1)

At Haas since 2021

2021 - present, Assistant Professor, Marketing Group, Haas School of Business 2019 – 2021, Assistant Professor of Marketing, Booth School of Business, University of Chicago

Working Papers (3)

Why (and When) Are Uncertain Price Promotions More Effective Than Equivalent Sure Discounts?

Celia Gaertig, Joseph P. Simmons

Should Advisors Provide Confidence Intervals Around Their Estimates?

Celia Gaertig, Joseph P. Simmons

Does Dialectical Bootstrapping Improve the Wisdom of the Inner Crowd?

Celia Gaertig, Joseph P. Simmons

Selected Papers & Publications (6)

Combining Probability Forecasts: 60% and 60% Is 60%, but Likely and Likely Is Very Likely

Management Science

Robert Mislavsky, Celia Gaertig

2021 (Forthcoming)

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The Psychology of Second Guesses: Implications for the Wisdom of the Inner Crowd

Management Science

Celia Gaertig, Joseph P. Simmons

2021 (Forthcoming)

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Decisional Autonomy Undermines Advisees’ Judgments of Experts In Medicine And In Life

Proceedings of the National Academy of Sciences

Samantha Kassirer, Emma E. Levine, Celia Gaertig


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Extremeness Aversion Is a Cause of Anchoring

Psychological Science

Joshua Lewis, Celia Gaertig, Joseph P. Simmons


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When Does Anger Boost Status?

Journal of Experimental Social Psychology

Celia Gaertig, Alixandra Barasch, Emma E. Levine, Maurice E. Schweitzer


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Do People Inherently Dislike Uncertain Advice?

Psychological Science

Celia Gaertig, Joseph P. Simmons


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Teaching (1)

Decision Making, MBA

Spring 2022