Comparison is back in fashion. In some fields it has spawned a vast literature and become the etiquette for discussions of appropriate focus and methods. The advent of big data and AI debates revolving around this have also rejuvenated comparative quantitative research. In other fields, however, comparison peaked long ago. There is a complex and uneven historical variance across disciplines. The new blog series ‘Comparing comparisons’ investigates which role comparisons play in different research fields, ultimately tackling the question of how and why we compare in the social sciences and humanities. The blog entries originate from the presentations of the international and interdisciplinary meeting by scholars affiliated with the Max Weber Research Group at the National University of Singapore and researchers from the German Institute for Japanese Studies that took place in Tokyo on 2nd and 3rd December 2019. Read the first article „Comparing Comparisons – Introduction and Overview“ by James D. Sidaway and Franz Waldenberger on trafo blog for transregional research.