Of the 15 most important world economies, the United States ranks in the middle in terms of economic and business dynamism, Hamid Moghadam, chairman and CEO of AMB Property, an international industrial realty developer which focuses on distribution, told CNBC Tuesday.

"We used to be one of the more user-friendly countries to business- I think we're part of the middle to the lower part of the pack now," Moghadam said. "Brazil is on fire; China is pretty strong; Canada is good. The United States would fall in the middle with Europe, and Japan being the slowest."