Publications

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2025
Working Paper

A Cognitive Theory of Reasoning and Choice

By: Pedro Bordalo, Nicola Gennaioli, Giacomo Lanzani and Andrei Shleifer

We present a theory of decisions in which attention to the features of choice options is determined by the decision maker's categorization of the current choice problem in a set of problems she solved in the past. Categorization depends on goal-relevant as well as... View Details

Keywords: Cognition and Thinking; Perception; Decision Choices and Conditions

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2024
Working Paper

Finance Without Exotic Risk

By: Pedro Bordalo, Nicola Gennaioli, Rafael La Porta and Andrei Shleifer

We address the joint hypothesis problem in cross-sectional asset pricing by using measured analyst expectations of earnings growth. We construct a firm-level measure of Expectations Based Returns (EBRs) that uses analyst forecast errors and revisions and shuts down any... View Details

Keywords: Investment Return; Financial Markets; Behavioral Finance; Risk and Uncertainty

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2023
Working Paper

How People Use Statistics

By: Pedro Bordalo, John J. Conlon, Nicola Gennaioli, Spencer Yongwook Kwon and Andrei Shleifer

We document two new facts about the distributions of answers in famous statistical problems: they are i) multi-modal and ii) unstable with respect to irrelevant changes in the problem. We offer a model in which, when solving a problem, people represent each hypothesis... View Details

Keywords: Decision Choices and Conditions; Microeconomics; Mathematical Methods; Behavioral Finance

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September 2021
Article

Diagnostic Bubbles

By: Pedro Bordalo, Nicola Gennaioli, Spencer Yongwook Kwon and Andrei Shleifer

We introduce diagnostic expectations into a standard setting of price formation in which investors learn about the fundamental value of an asset and trade it. We study the interaction of diagnostic expectations with two well-known mechanisms: learning from prices and... View Details

Keywords: Bubble; Speculation; Diagnostic Expectations; Price Bubble; Mathematical Methods

Article

Memory and Representativeness

By: Pedro Bordalo, Katherine Baldiga Coffman, Nicola Gennaioli, Frederik Schwerter and Andrei Shleifer

We explore the idea that judgment by representativeness reflects the workings of episodic memory, especially interference. In a new laboratory experiment on cued recall, participants are shown two groups of images with different distributions of colors. We find that i)... View Details

Keywords: Cued Recall; Interference; Similarity; Probabilistic Judgments; Heuristics And Biases

2020
Working Paper

Older People Are Less Pessimistic About the Health Risks of COVID-19

By: Pedro Bordalo, Katherine B. Coffman, Nicola Gennaioli and Andrei Shleifer

A central question for understanding behaviour during the COVID-19 pandemic, at both the individual and collective levels, is how people perceive the health and economic risks they face. We conducted a survey of over 1,500 Americans from May 6–13, 2020, to understand... View Details

Keywords: Health Pandemics; Risk and Uncertainty; Perception; Age

March 2019
Article

Beliefs about Gender

By: Pedro Bordalo, Katherine Baldiga Coffman, Nicola Gennaioli and Andrei Shleifer

We conduct laboratory experiments that explore how gender stereotypes shape beliefs about ability of oneself and others in different categories of knowledge. The data reveal two patterns. First, men’s and women’s beliefs about both oneself and others exceed observed... View Details

Keywords: Performance Evaluation; Perspective; Prejudice and Bias; Gender

2018
Working Paper

Diagnostic Bubbles

By: Pedro Bordalo, Nicola Gennaioli, Spencer Yongwook Kwon and Andrei Shleifer

We introduce diagnostic expectations into a standard setting of price formation in which investors learn about the fundamental value of an asset and trade it. We study the interaction of diagnostic expectations with two well-known mechanisms: learning from prices and... View Details

Keywords: Bubbles; Price Bubble; Mathematical Methods

November 2016
Article

Stereotypes

By: Pedro Bordalo, Katherine Baldiga Coffman, Nicola Gennaioli and Andrei Shleifer

We present a model of stereotypes based on Kahneman and Tversky's representativeness heuristic. A decision maker assesses a target group by overweighting its representative types, which we formally define to be the types that occur more frequently in that group than in... View Details

Keywords: Prejudice and Bias