By Jeffrey Stein, Hap Shashy, Alana Griffin and Ellen Sueda ( June 13, 2017, 1:24 PM EDT) -- The U.S. Securities Exchange Commission investigation of and the action taken against MDC Partners Inc. and its former CEO, Miles S. Nadal, underscore the importance of proper disclosure of executive compensation. Between 2009 and 2014, MDC disclosed in its proxy statements some, but not all, of the perquisites paid to Nadal and on his behalf. The estimated $11.285 million worth of perquisites that MDC failed to disclose included private aircraft usage, club memberships, cosmetic surgery, yacht- and sports car-related expenses, jewelry, charitable donations, pet care, and personal travel expenses. The director of the SEC's Philadelphia Regional Office highlighted the importance of properly disclosing named executive officer compensation: "Perks paid to corporate executives should be properly disclosed so that investors can make informed decisions."...