WASHINGTON–(BUSINESS WIRE)–Calvert Research and Management (Calvert) is pleased to announce the 20th anniversary of the Calvert Women’s Principles, the first global code of corporate conduct focused exclusively on advancing, protecting and investing in women. Developed in 2004 with the support of the United Nations, the Calvert Women’s Principles provide a set of standards for companies to measure progress and serve as a tangible indicator for investors to assess the evolution of gender equit