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Billionaires1996-2014.dtais the dataset I used from researchers Caroline Freund and Sarah Oliver at the Peterson Institute for International Economics. You can find their working paper and the zip-file with all of their datasets here. -
Guide to Billionaires Characteristics Database.pdfis a data dictionary of the files provided by the researchers and the variable names. -
Billionaires.Rmdcontains my code for the visualizations. It produces the HTML fileBillionaires.html.
Read the post I wrote here.