Gerrit Bauch is a research associate at the Center for Mathematical Economics at Bielefeld University and a member of CeUS.

Dear Gerrit, what connects you to Bielefeld University?

I've always wanted to bring together my passion for mathematical models and my wish to apply it to real-world applications. During my master studies at Heidelberg University, I've gotten into touch with game and decision theory under uncertainty - for me the perfect mix of mathematics and economic application. After some searching it became clear that Bielefeld University offers the perfect place for this kind of academic prospect. Following in the footprints of Reinhard Selten, especially the Center for Mathematical Economics has ever since become a hub for interdisciplinary researchers who aspire to provide the social sciences with formal mathematical foundations - exactly what I have been looking for.

What role does Uncertainty play in your research?

My research deals with imprecise probabilistic information, also known as "Knightian Uncertainty". You see, there's an important difference between situations where probabilities can be quantified or are unknown: Imagine an urn containing 100 balls, either of red or black color respectively. If, e.g., it is known that exactly 50 balls are black, we can assign probabilities for each draw, granting us access to the apparatus of probability theory. In contrast, if the number of black/red balls is unknown, we can't confidently assign precise probabilities to the outcomes. Hence there could be 0-100 black balls and only one out of 101 Bayesian models describes the correct statistics of the urn in question. We thus rather face ranges for the probability of drawing a black ball.

I'm interested in how people (should) cope with Knightian Uncertainty and their theoretical implications.


To what extent is interdisciplinarity important in your work?

Being based at the Center for Mathematical Economics, interdisciplinary research has always been in the center of my post-master career. This is even true beyond the intersection of mathematics and economics. Some of my research touches the realms of linguistics, explaining robustness properties of formal languages when facing errors in communication. In another project, I have been working on a partnership dissolution mechanism used in joint ventures. Eliciting uncertainty as a sufficient driver for an efficient outcome mitigates the importance of court decisions on the assignment of roles among co-owners.


What would you like to accomplish in a Center for Uncertainty Studies?

CeUS and the MODUS initiative have opened my horizon for further interdisciplinary cooperation with top researchers from other social sciences. More concretely, I wish to contribute to other fields with formal approaches that help to quantify and distinguish different sources of uncertainty. By doing so, I believe that modes of navigating uncertainty can more easily be detected and characterized further across different fields. In addition, talking to researchers from different fields unravels instances of real-world approaches to dealing with uncertainty that have not yet been described in economics, sparking new modeling ideas.
 

The first CeUS conference ("Navigating Uncertainty: Preparing Society for the Future") took place in Bielefeld at the beginning of June - which moments were particularly exciting for you? What do you take away?

The first CeUS conference has stressed that uncertainty is a pervasive topic, relevant to almost every field. It became clear to me that people from many fields follow similar lines of thinking while not yet having been able to combine their thoughts and forces to overcome one of the biggest distresses of our society.

An intriguing idea that especially stood out to me as a decision theorist was a suggestion by Carlo Jäger, the chairman of the Global Climate Forum. Instead of asking politicians for a concrete action to take (such as whether or not to lock-down the country), they can be advised of possible decision rules, describing general qualitative properties of dealing with uncertainty, and asked to pick among those. On that basis, an optimal action to be implemented can be derived.

 
To sum it up: Do you have specific strategies in your personal or professional life to deal with uncertainty?

For many people, uncertainty goes along with a feeling of unease and insecurity. However, we should not forget that uncertainty also offers opportunities. In that sense, I aim to confine uncertainty to the extent that I feel comfortable, but at the same time stay open for positive surprises.  

Thank you very much!


Further info about Gerrit Bauch is available here: https://gbauch.github.io/