Wharton is the business school of the University of Pennsylvania. He went to business school and got and completed all the same business requirements everyone else has to take. I studied accounting at university along side finance, business administration, supply chain, and economics students. I'm sure there are plenty of schools who offer a degree just called "business," but most people have a specific business degree. I'm looking at the degree requirements right now, it's all the same stuff everyone has to take: marketing, management, logistics, stats, finance. Unless things were really different back then, an economics degree from Wharton is definitely a business degree.