Do you know some European conferences requiring to send sole abstract which is then published in book of abstracts? I am searching mostly for conferences in Operations Research with an economics section (but other related sciences could also be ok if they meet the conditions).
Do you know some of these conferences, for example like EURO conference which suits it the best: https://euro2022espoo.com/?
I know there is a list on a site such as INOMICS: https://inomics.com/, but I haven't seen there any operations research conferences as EURO.
Do you know some other lists/sites?
Possibly, conferences requiring to send a paper but publishing only abstracts in book of abstracts would be ok as well, but they are not the prime focus of this question.