NEW YORK--(BUSINESS WIRE)--Blackstone (NYSE:BX) today announced that its retail real estate portfolio companies in the United States have entered into partnership with Raider Hill Advisors. Raider Hill Advisors was formed by Dan Hurwitz, who most recently served as Chief Executive Officer of DDR Corp (NYSE:DDR), the largest power-center REIT in the United States. Before joining DDR in 1999, Mr. Hurwitz served in a variety of executive and management roles within the retail and shopping center i