About the Authors

Uri Simonsohn

Uri Simonsohn is a professor at the ESADE Business School at Ramon Llull Universitat in Barcelona, Spain. He is also a senior fellow at the Wharton School of the University of Pennsylvania, where he served on the faculty from 2003 to 2017. He holds an undergraduate degree in economics from Pontificia Universidad Católica de Chile (1997) and a PhD in Social and Decision Sciences from Carnegie Mellon University (2003).

His work sits at the intersection of behavioral science and research methodology, with a focus on exposing and correcting flawed practices in empirical research — including the development of p-curve as a statistical tool for detecting evidential value and publication bias.

Uri has discussed research credibility and scientific fraud detection on the Freakonomics podcast episode on shoddy science, the People I Mostly Admire podcast on data sleuthing, and the Rationally Speaking podcast on detecting fraud in social science. Many of his papers are openly available through Uri Simonsohn's SSRN author page.

Joe Simmons

Joe Simmons is a professor at the Wharton School of the University of Pennsylvania. Before joining Wharton, he held a faculty position at Yale University. He earned a BS in psychology from Mount Saint Mary's College (1999) and a PhD in Psychology from Princeton University (2004).

His research addresses two interconnected themes: the psychology of judgment and decision making — with a focus on mapping and correcting the biases that distort human predictions and choices — and the development of practical, low-friction research norms that improve the reliability and reproducibility of published findings.

Leif Nelson

Leif Nelson is a professor at the Haas School of Business at the University of California, Berkeley. He previously held faculty positions at New York University and the University of California, San Diego. He received his undergraduate degree in psychology from Stanford University (1998) and a PhD in Psychology from Princeton University (2003).

Using lab and field experiments, his research investigates the role of altruism in profit-oriented markets and develops methods for assessing and strengthening the quality of scientific evidence.