Center for Research on Environmental Decisions in Berlin


Led by Professors Elke Weber (Princeton University) and Eric Johnson (Columbia University), we are a dedicated group of six researchers passionate about leveraging behavioral and social sciences to confront challenges related to climate change. On our website, you’ll discover insights into our cutting-edge research, stay updated on the latest news and events, and get to know our team members. Whether you’re a fellow researcher, a policymaker, or simply someone curious about our work, we invite you to explore and engage with our content.

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The climate crisis is a global problem that requires working together. To foster collaboration and share our work with the world we are actively participating in several events.

Below, we will show you a mix of conferences, workshops, and other events we are actively involved in.


Upcoming Events


Weizenbaum Conference

June 17-18, 2024

Our work on “Determinants of pro-environmental Attitudes and Behaviors in the digital Era” has been accepted at the prestigious Weizenbaum Conference. For our work we explored the case of German workers in high-emitting industries.

Find out more about the conference here.


Lange Nacht der Wissenschaften (LNDW) at TU Berlin

June 22, 2024

We are looking forward to presenting our work at the LNDW hosted at TU Berlin. We will have a booth at Wilhelmstraße 67 and invite for conversation and discussion related to our work. We will also prepare a little “climate quiz” for our visitors!

Find out more about the LNDW here.



September 25-26, 2024

We are thrilled to have been selected to hold a workshop at the K3 (“Kongress zu Klimakommunikation” – Congress about Climate Communication) in Graz, Austria. In the interactive workshop we will tackle the question how climate communication can strengthen social cohesion despite the climate crisis.

Find out more about the K3 Congress here.


DGPs/ÖGP Congress 2024 in Vienna

September 16-19, 2024

We are happy that our submission to the DGPs/ÖGP in Vienna was accepted. Jonas will present our ongoing work on CO2-emissions of behaviors and policies at the conference.
Find out more about the conference here.


Association for Consumer Research (ACR) Conference

September 26-29, 2024

CREDiBl will be in Paris at the end of September: In tandem with our Columbia team, we will be organizing a session titled “Consumer Climate Challenge: Behavioral Science for the Climate Crisis”. We are delighted to be represented at this prestigious conference.

You can find out more about the ACR conference here.


Past Events



What Works Climate Solutions (WWCS) Summit

June 9-12, 2024

In early June, we took part in the WWCS Summit at TU Berlin with two program items.

On the second day of the conference, Arian Trieb presented our research on climate communication in German politics (see picture top left).
On the third day of the conference, Professor Elke Weber took part in a panel discussion on “Democracy and Climate in Crisis” (bottom left).

Further information about the WWCS Summit can be found here.



Behavioral Decision Research in Management (BDRM) Conference

June 6-8, 2024

We are glad that our colleague Eli Sugerman (Columbia Business School) presented our joint ongoing work on carbon misestimations and “attribute substitution” at the renown BDRM Conference in Chicago.
Further information about the conference is available here.

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Research & Insights


Below a brief overview of our ongoing projects. We will soon publish results and insights here – stay tuned!

(Curing) Carbon Ignorance

In terms of carbon emissions, is it better to switch to a green energy provider or to take one less round-trip to the Canary Islands? Would federal-road tolls curb emissions more than banning domestic flights? Does McDonald’s have a bigger carbon footprint per 10€ of revenue than Tchibo?

In a replication and extension of Johnson et al. press) we let German participants ponder these questions and we are working on ways to improve their carbon judgements. What we can already say: People aren’t particularly great at making these judgements!

Climate Communications of German Politicians

It’s been a while since the Green Party was part of the German government. Furthermore, a coalition of three different parties has certainly not been the norm in Germany until now. “Fortschrittskoalition” (progressive coalition) and “Zeitenwende” (turn of an era) are buzzwords the 2021 elected German government uses frequently.

However, what about their climate-related communication? What are patterns and insights in the way they communicate? We are currently working on these questions by analyzing hundreds of press releases by the current government. Our preliminary results were accepted at the What Works Climate Solutions Summit, where we will present our findings.

Attitude-Behavior Gap and Cognitive Dissonance related to Climate

How do workers in high-emitting industries think about carbon emissions? Are there climate-related behaviors at home different than at work? Do they feel “cognitive dissonance” (i.e. discomfort when behaviors do not align with values or beliefs)? Is this different from workers in the tech industry, for instance?

In our recent studies we are exploring these questions. We are happy that our results were accepted at the 2024 Weizenbaum Conference, where we will discuss these findings in depth.

Drivers of pro-environmental behavior

In order to meet the binding targets for climate neutrality, Germany will need a fundamental change in policy and behavior in all areas of society. But what drives pro-environmental behavior? Do pro-environmental attitudes really lead to pro-environmental behavior? What is the role of moral disengagement, innovation, or emotions? We are exploring these questions in an analysis of citizens and political decision-makers from small German municipalities. Visit us at the Lange Nacht der Wissenschaft where we will present this project.

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We are a dedicated group of six researchers passionate about leveraging behavioral and social sciences to confront challenges related to climate change.

Professor Elke U. Weber

A psychology professor at Princeton University, Elke U. Weber is currently an Einstein Visiting Fellow at the Science of Intelligence Center, where she researches political decision-making powers and global action to tackle climate change through the behavioral and social sciences. Elke Weber is connected to the Center Climate Change, and draws on psychological theories to investigate the extent to which personal experiences, as well as social norms and interactions, affect decision-making and action. To ensure the study considers the specific social and existential factors that influence people’s decision-making, Elke Weber’s project is based on a comparative analysis of existing studies on climate policy and environmental protection measures, comparing Berlin-Brandenburg, New Jersey (USA), and New Delhi (India).

Professor Eric J. Johnson

Eric J. Johnson from the Center for Decision Sciences at Columbia University is is currently an Einstein Visiting Fellow at the Science of Intelligence Center. In his CREDiBl project he links climate research with the behavioral sciences and economics. Based at the Technische Universität, Eric Johnson researches decision architectures, i.e. ways of presenting choices and facilitating decision-making processes by utilizing the various social, economic, and psychological factors that shape our actions. Using empirical methods as well as face-to-face and online interviews, the projects aim to develop approaches and tools for political structures and businesses to more effectively communicate their carbon impact to citizens. In addition, we are exploring effective carbon labeling and other forms of choice architecture to improve citizen’s knowledge of their carbon footprint

Johnson is also the author of The Elements of Choice, a book describing choice architecture and its consequences.

Dr. Lubna Rashid

Lubna’s work lies at the intersection of ecological sustainability, behavioral psychology, and digital entrepreneurship. She is particularly interested in understanding the drivers of (un)sustainable decision-making and the behavioral change surrounding climate adaptation and mitigation. She presently works with the Berlin Brandenburg Climate Change Center and the Princeton University Behavioral Science for Policy Lab Prof. Dr. Elke Weber. Her current research aims to uncover the psychological states and traits (e.g. well-being, cognitive dissonances, moral disengagement strategies), personal experiences, and social norms surrounding the climate transition, particularly in the areas of building and transportation in Berlin and Brandenburg. Lubna’s eclectic background spans biology and ecology, industrial engineering, and entrepreneurship in fragile contexts. Lubna is part of the Einstein Visiting Fellowship, which links climate research with behavioral sciences and economics.

Dr. Jonas Ludwig

Jonas does research at the intersection of behavioral economics and social/cognitive psychology, focusing on judgment and decision making across various domains. He currently works with TU Berlin’s Climate Change Center Berlin Brandenburg and the Center for Decision Sciences at Columbia University. Jonas is particularly interested in better understanding how motivational and social factors affect choices and decision processes in situations that many decision makers perceive as difficult, for instance, because conflicting motivations pull them in different directions. His current projects focus on how people judge the ecological impact of consumer choices, as well as decision making related to sustainability, climate action, and ethical behavior more generally. Jonas is a member of Eric Johnson’s Einstein Visiting Fellowship Team.

Vanessa Hiess

Vanessa completed her Bachelor’s degree in Political and Administrative Sciences at the University of Constance before successfully completing her Master’s degree in Innovation Management, Entrepreneurship and Sustainability (IMES) at TU Berlin. After gaining professional experience in advocacy for higher education and research in Brussels and in the field of sustainable development policy in Berlin, she began her doctorate under the supervision of Prof. Jan Kratzer. With her doctoral application, Vanessa received an Einstein Fellowship and is thus part of the Center for Research on Environmental Decision-Making in Berlin, which is led by Prof. Elke Weber (Princeton) and Prof. Eric Johnson (Columbia). Her research is located at the interface of sociology, psychology, sustainability and behavioral sciences, focusing on (un)sustainable behavior of decision-makers.

Arian Trieb

Arian Trieb is a predoctoral researcher, specializing in the study of decision-making processes and their impact on sustainable consumption. Arian recently completed an MPhil degree at the Judge Business School, University of Cambridge. Prior to joining CREDiBl, Arian gained valuable industry experience as an account strategist at Google. With a keen interest in understanding how individuals make sustainable decisions, Arian collaborates with Professors Johnson and Weber, as well as with postdoctoral researchers Lubna Rashid and Jonas Ludwig. Together, they focus on examining the effective implementation of choice architecture to promote the adoption of sustainable behaviors in the Berlin and Brandenburg regions. Arian is part of the Einstein Visiting Fellowship, which links climate research with behavioral sciences and economics.

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Elke Weber
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