In the Inclusive wealth report 2012 and 2014 (lead author Partha Dasgupta) it was said that it was a biennial publication. But I can't find an edition after 2014. Am I overlooking something?
Usually it is the journal Forbes that publishes these reports periodically. You could browse this journal, or surf the internet for information. There is an open interactive map of wealth report world-wide in the following link:
I am just proofing the galleys for my chapter of the IWR report following IWR 2014. So it will be out in 2018. I don't know how long it usually takes from galley proof stage. So it did not end up being a biennial publication.
Inclusive Wealth Report (IWR) 2018 is going through the final proof stage. We expecting that it will be available by July, 2018. The open access contract is completed. So anyone can explore this edition of IWR.