In this comment, I am presenting several issues concerning the paper Obesity of politicians and corruption in post-Soviet countries, written by Pavlo Blavatskyy and published in Economics of Transition and Institutional Change (2020). The issues are grouped into two categories: conceptual, which deals with research design and ethics; and methodological, which includes specific statistical methods, concepts and decisions. While these aspects are important in doing valid and beneficial research, some of them carry inherent subjectiveness. Therefore I posit these arguments not as judgements but expanded (and hopefully substantiated) talking points. 1 I did not ask for the original data and analysis notes, as the paper included an appendix of photos used, BMI-estimation algorithm, and though the other data points were not referenced directly, they were identifiable from the text. How to cite this article: Márk Kis G. Conceptual and methodological issues in Obesity of politicians and corruption in post-Soviet countries-A comment.