Abstract: In the present paper it is argued that differences among economic models are basically differences in their selected part of the real world these models try to account for. Therefore, their range of applicability to a target system turns out to be important for their selection to particular purposes. In this respect, an approach based on the similarity of models to a target system and to the modelers’ purposes is provided. It is also argued that models vary in values of similarity. These values will help agents to select the model that best meets the role of examining some phenomenon of interest.

Keywords: similarity; economic models; mechanisms; possibility tree; substantive assumptions; domain of applicability.

The public research seminars of the Department of Economics and Finance (DEF) at Tallinn University of Technology  usually take place on the second and fourth Wednesdays of the month in both onsite and online format, unless announced otherwise. The presentation will last approximately 45 minutes followed by 15 minutes of discussion. The seminars are held in English. Copies of the paper are usually made available at the seminar. The DEF seminar series is organised in collaboration with the project ”Individual Behaviour and Economic  Performance: Methodological  Challenges and Institutional Context” (IBEP), which has received funding from the European Union’s Horizon 2020 Research and Innovation programme under Grant Agreement No 952574. Questions about the seminar can be sent to the IBEP seminar coordinator Rachatar Nilavongse, rachatar.nilavongse@taltech.ee.