Tilburg Institute for Behavioral Economics Research

Understanding the psychology of economics

Tilburg Institute for Behavioral Economics Research

Past symposia and conferences

15th TIBER Symposium

On August 26th 2016, the Tilburg Institute for Behavioral Economics Research organized the 15th Tiber Symposium on Psychology and Economics at Tilburg University. Keynote speakers were

Program 15th TIBER Symposium

14th TIBER Symposium

At August 27th 2015, the Tilburg Institute for Behavioral Economics Research organized the 14th Tiber Symposium on Psychology and Economics at Tilburg University. Keynote speakers were

  • Maya Bar-Hillel from the Hebrew University of Jerusalem, and
  • Armin Falk from the University of Bonn.

Program 14th TIBER Symposium

13th TIBER Symposium

At August 22nd 2014, the Tilburg Institute for Behavioral Economics Research organized the 13th Tiber Symposium on Psychology and Economics at Tilburg University. Keynote speakers were

Program 13th TIBER Symposium

12th TIBER Symposium

The 12th Tiber Symposium on Psychology and Economics was held on August 16, 2013

The symposium aims to bring together Economists, Psychologists, Marketing researchers and others who work on Behavioral Decision Making, either in individual or interdependent settings. The symposium will be held at Tilburg University and consists of two keynotes, a number of parallel sessions with presentations of about 20-30 minutes, and a poster session.

We are proud to have economist John List the University of Chicago as one of this year’s keynote speakers.

Obedience (joint work with Alexandrox Karakostas)

When: Wednesday, April 24th 2013

Speaker: Daniel Zizzo (University of East Anglia)


We use an experiment to show that conformity to a cue by an authority, due to social image utility towards the authority, is a powerful motivating mechanism. We do this in an experiment where obedience implies the destruction of half of the earnings of another subject at a cost to one's own earnings. Six subjects out of ten are willing to destroy when more pressure is provided at specific intervals in time, with no need for an explicit reason or for the potential for reciprocal aggression. Social image towards the authority explains the extent of the destruction found.


Date: Friday, August 24th 2012

Location: Tilburg

TIBER XI was a succes, thank you for attending. If you took pictures, please send them to Job van Wolferen.

David Ong & Ralph Bayer

Date: Wednesday, May 2nd 2012

David Ong (Peking University)

"Can There Ever Be Too Many Flavors of Häagen-Dazs? Anticipatory Beliefs and Choice Overload Behavior"
A growing body of research in psychology and economics has attempted to demonstrate that people can suffer from “choice overload” from too many choices. This large and growing literature was initiated by Iyengar & Lepper’s (2000) (IL’s 2000) field experiment which showed that people were less likely to purchase when faced with more variety. Though intuitively appealing, attempts at replication have yielded mixed results. A 2010 meta-analysis concluded that there was as yet no sufficient. We hypothesized that choice overload behavior was driven by uninformed consumers’ anticipatory beliefs about surplus from sampling. We first surveyed subjects for possible “disgust” in 6 product categories. We then randomly chose 4 among these and secretly observed consumers after we switched between high and low varieties. As predicted, we found that choice overload behavior was an increasing function of surveyed disgust. Hence, surveyed disgust could be a sufficient condition. To our knowledge, this is the first data to separate psychological theories of choice overload behavior (starting with IL 2000), which predicts choice overload behavior to be increasing on the number of options, and contextual inference theory of Kamenica (2009), in which consumers should infer decreasing average surplus for increasing variety. We extend this theory by allowing consumers who like a product more to be more to be tolerant of disappointment in sampling. Now, consistent with the meta-analysis and our data, choice overload or choice loving behavior would be predicted depending upon anticipated surplus.

Ralph Bayer

"Facing man or machine -- when do humans reason better?"

In this paper we design a logical reasoning task that can be represented as a game with other players or as a decision problem, where automata take the role of the other players. The task is designed such that strategic uncertainty should not play a role, and hence the quality of reasoning should be independent of framing. Varying the difficulty of the task (i.e. iteration steps required), we find that for difficult tasks subjects perform much better if they play with computers, while the opposite is true for simple problems. These surprising results have important implications for the expected quality of human reasoning in games.

Economics and Psychology of Lifecycle Decision Making

Date: Thursday, February 23rd 2012

Location: De Rode Hoed, Keizersgracht 102, 1015 CV Amsterdam

Netspar Theme Conference

Keynote speaker will be Brigitte Madrian from Harvard University. The conference features presentations and discussions on a variety of topics such as savings and asset choice, insurance markets, probability perceptions, risk attitudes, solidarity, trust and field experiments.

This conference is organized by Peter Kooreman (Tilburg University) and Jan Potters (Tilburg University) and funded by the theme Economics and Psychology of Life Cycle Decision Making.

Workshop 'Experimental Economics on Games, Labor and more'

Date: Friday, January 27th 2012

Location: K 834 Koopmans building

Meaning and Existential Psychology Conference

TIBER/EASP/SPSSI Meaning and Existential Psychology Conference

Date: Thursday, November 17th & Friday, November 18th 2011

Location: De Harmonie Tilburg

Inaugurele rede Prof.dr. S.M. Lindenberg

Date: Friday, November 11 2011

Location: Aula, Cobbenhagen building

Long Term Psychology

The symposium on ‘Long Term Psychology’ will take place on Thursday the 6th of October at Tilburg University. It promises to be an interesting symposium with excellent speakers from different disciplines, all giving their view on how to encourage behaviors that are better for the self and society in the long run.

In this symposium, we will look at what the different disciplines in psychology and marketing can teach us about Long Term Psychology. Think of health behaviors like dieting and exercising, sustainable behaviors like recycling and fostering CO2 storage, and behaviors that encourage tolerance to others. This symposium thus not only focuses on new, cutting-edge research, but also on the societal relevance of this research.

The symposium will consist of six keynote addresses, each followed by a plenary discussion. As such, we hope to offer you an interactive and interesting symposium, with a line-up of renowned speakers:

  • Nira Liberman (Tel Aviv University)
  • Bram van den Bergh (Erasmus Universiteit Rotterdam)
  • Carolien Martijn (Maastricht University)
  • Emely de Vet (Universiteit Utrecht)
  • Fieke Harinck (Universiteit Leiden)
  • Yoel Inbar (Tilburg University)

Building Synthetic Economies

Name: Prof. Robert Bloomfield

Date: Friday, Octobre 7th 2011

Location: Faculty Club

Robert Bloomfield will describe the goals and challenges of his Synthetic Economy Research Engine (SERE), a software platform being developed to allow researchers to construct experimental settings in which participants manage virtual firms with realistic production processes, endogenous competitive pressures, flexible contractual arrangements and varied financial reports.

10th Tiber Symposium on Psychology and Economics

10th Tiber Symposium on Psychology and Economics


The 10th Tiber Symposium on Psychology and Economics was at Tilburg University on Friday August 19th, 2011.

Keynote speakers:

Dan Ariely and James Andreoni are confirmed keynote speakers for this year's event. We also host another 46 talks by researchers from all across the world. They present their latest work in 25-minute presentations.

9th Tiber Symposium on Psychology and Economics

9th Tiber Symposium on Psychology and Economics

This 9th Tiber Symposium on Psychology and Economics will be held in the Dante Building of the Tilburg University on Friday August 27, 2010.

The two keynote speakers for 2010 are Deborah Small (University of Pennsylvania) and Matthias Sutter (University of Innsbruck).

The goal of this series of symposia is to establish contact and discussion between researchers of the different fields. We look for empirical contributions from the diverse fields, such as Individual Decision Making, Consumer Behavior, Bargaining, Social Dilemmas, Experimental Games, Emotions, Fairness and Justice, Rational Choice and related subjects.

The Program & Organizing Committee consists of

"Multiple selves and sustainable development"

Tiber Conference "Multiple selves and sustainable development"

This symposium on "multiple selves and sustainable development" was organized in the Royal Academy of Sciences Building ("Trippenhuis"), in Amsterdam, in the Netherlands on April 22-23, 2010. Unfortunately this conference had to be cancelled due to the volcano problems and the closed air traffic, however we were able to move the symposium to a later date and a different location.
Period: November 18-19, 2010. Location: the NH Hotel Carlton, Vijzelstraat 4, 1017 HK Amsterdam (The Netherlands).


  • Siggie Lindenberg (Groningen, sociology / normative behavior)
  • Michael Inzlicht (Toronto, neuro issues and insights)
  • Aaron Kay (Waterloo, justification sysems)
  • Travis Proulx (Vancouver, empirical existentialism)
  • Jeff Stone (Arizona, consistency theories)
  • Marcel Zeelenberg (Tilburg, emotions)
  • Kathleen Vohs (Minnesota, resource depletion)
  • Dan Goldstein (London, decision making)
  • Paul Sparks (Sussex, attitude-behavior discrepancy)
  • Geoffrey Miller (New Mexico, evolutionary theory)
  • Ken Fujita (t.b.a.)
  • Tom Postmes (Groningen, self-categorization theory/groups)

End notes by: Henriette Prast (Scientific council, The Hague & Tilburg University)


One of the biggest challenges for governments all around the world is to make people "greener", or to put in more precise terms, to "mobilize consumer demand for sustainable development." Doing this is especially challenging because numerous surveys show again and again that people often are "green" in their talk, but not in their "walk." Why does this attitude-behavior gap exist and how can we close it attitude-behavior gap? How can we make people walk their talk? The Dutch government has made funds available (see www.transforum.nl) for scientific efforts designed to answer these questions. Thus, PhD students, postdocs, and senior researchers are working on all kinds of more basic and more applied empirical research projects.

However, we think it is also important to reflect on the general issue of attitude-behavior discrepancies (broadly defined) with a number of the world's leading academics. After all, in the relevant literatures, the fact that people do not act on their (good) intentions comes in many forms and has been described in terms of, inter alia, diverging morals (e.g., "inner angles versus inner demons"), roles (e.g., consumer versus citizen roles),identities (e.g., collective versus personal), processing modes (e.g., reflective versus reflexive), different types of social values (e.g., prosocial versus proself), and even as originating in different brain areas (e.g., the emotional versus the deliberative brain). What all these perspectives seem to have in common is that they suggest that the attitude-behavior gap in consumer demand for sustainable products and services originates in what could be called a mild "multiple personality disorder." People have "multiple selves" that do not always nicely correspond and communicate with each other.

We think it will be inspiring and refreshing to bring together a large number of divergent scientific disciplines and theoretical approaches to address and explain the multiple selves that drive the attitude-behavior discrepancy in consumer demand for sustainability. Such combined and enriched insights are essential and relevant for scientific progress and should have considerable policy implications. Thus, our aim is to investigate how insights from basic science can be used to mobilizing consumer demand for sustainable development. In doing so, we take the sustainability concept broad to include many forms of pro-social behavior including the fields of health, environmental issues, animal welfare, fair trade, and regional products.