(this was compiled from one of my previous responses for another post...but I thought it might be helpful for others)
DocNet is an organization of universities granting doctoral degrees in business administration and economics. Its purpose is to promote doctoral education in business throughout the world.
https://www.coba.usf.edu/docnet/Here is a little info about the PhD in business and some of the qualities of most programs...it was posted before somewhere in here.
https://www.hbs.edu/doctoral/SYOA/ The PhD Project is designed to encourage African Americans, Hispanic Am. and Native Am. to pursue a PhD in business...the website is helpful in locating info concerning the culture of the PhD programs and other misc. info.
https://www.phdproject.org Another thing is to make sure the school AACSB accred. You may already know this....but here is a list of AACSB accred schools with Phd Programs
https://www.aacsb.edu/publications/dfc/phd-schools.asp Also....here is a site that ranks the doctoral programs worldwide....even though it states EMBA rankings...go through the ranking area options on top and find the one that states "FT Doctoral Rank" click on that and it ranks the best doctoral programs in the world in business...decided by financial times...
https://rankings.ft.com/rankings//index.jsp Hopefully that will give you a little insight and quite possibly aid your research.
~Christopher~