 NEW YORK--BUSINESS WIRE--Halper Sadeh LLP, a global investor rights law firm, is investigating whether the merger of MDC Partners Inc. NASDAQ: MDCA and Stagwell Media LP is fair to MDC shareholders. Stagwell and its affiliates are expected to hold approximately 79 of the common equity of the combined company after closing. Halper Sadeh encourages MDC shareholders to click here to learn more about their legal rights and options or contact Daniel Sadeh or Zachary Halper at 212 763-0060 or 