It is with great sadness that the UCL Department of Economics learnt of the death of their colleague, Professor Konrad Mierendorff, on Saturday 7 August 2021 in an accident whilst on holiday. Konrad will be sorely missed by his colleagues at UCL and throughout the wider economics world.
Konrad joined University College London (UCL) in 2014 as a Lecturer, and rose quickly through the department, becoming a Professor in 2020. He had studied at the University of Bonn, receiving both his Diploma and Doctorate in Economics, and graduated in 2010. He also spent time at the Paris School of Economics as a visiting doctoral student. Prior to joining UCL, he undertook academic positions at the University of Bonn, the University of Zurich, and Columbia University.
During his time at UCL, Konrad was known as a kind and generous teacher. He devoted great care and attention to his research students’ work. Invariably he thought hard about what they were working on and brought out the best in them. He never dismissed a student’s work out of hand, and could often detect interesting features of an idea where no one else could.
Over the past decade, Konrad developed his research interests in microeconomic theory, information economics, and mechanism design, and became an important leader in the group of economic theorists in the department, promoting interaction among students and academics. Konrad’s most recent work was on the dynamics of learning and information.
Konrad, and his co-author Yeon Koo Che, generated elegant models that clarified and illustrated many of the subtle issues that arise when we learn. Their first paper modelled the choices one might have to make when learning. In particular, one might choose to search for information that proves a hypothesis or to search for information that refutes it. Clearly, an omniscient being should do both at the same time, but if an individual has “limited attention” they are only able to do one of these activities. This paper determines how one should make such choices and when one might observe switching from one activity to the other.
In a subsequent paper, this was extended to a game where a principal is trying to persuade an agent that a state is true by providing evidence. The principal optimally chooses evidence of refutation in cases where their preferred state is likely, because in the absence of a refutation the agent’s beliefs slowly move up. However, in cases where the principal’s most preferred state is unlikely, they provide evidence that may prove the state. Thus, persuasion is gradual at high initial beliefs but lumpy and discontinuous at lower beliefs.
Konrad was one of the few economists who combine excellent technical skills with an outstanding ability to identify important, relevant problems. He rarely, if ever, succumbed to the temptation of working on a problem for the sake of producing just an elegant mathematical construct – all of his theories are tightly connected to applications and help us better understand real-life phenomena. He had recently won a 2021 European Research Council Consolidator Grant for his proposal “Dynamic Information Acquisition, Experimentation, and Communication”.
Konrad was Associate Editor at the Journal of the European Economic Association and at the European Economic Review, and had published in many top-ranked peer-reviewed journals.
For several personal tributes to him from his colleagues and students at UCL, please see the UCL website.
This obituary first appeared, in slightly different form, on the UCL website. Please see the UCL website for the original version and personal tributes. One such tribute came from his Head of Department, Professor Antonio Guarino: “We lost a great mind, a great colleague, a great friend. Konrad was a very deep thinker, a person of talent, humility, integrity. He always participated in the life of our community with intelligence and respect. We will miss him greatly, but his contribution to UCL and to Economics will last forever”.