"Squaring the Circle" is a collection of essays in honour of Bert Steenge on occasion of his retirement as a full professor of economics at the University of Twente. The title of this volume is based on Prof. Steenge's interest in seemingly unsolvable economic problems. The broad variety of topics in the book mirrors Prof. Steenge's wide area of interests in the field of economic analysis. The essays originate from presentations at the annual, binational Rothenberge seminar, organized by economists from the University of Munster and the University of Twente.