U.S. Treasury Secretary Janet Yellen recently visited China and met with senior Chinese economic and political officials. Mark Sobel, U.S. chairman of the Official Monetary and Financial Institutions Forum, reflects on her trip, and says U.S.-China dialogue on economic and other global issues is imperative. “I believe that if the world’s two largest economies … aren’t talking,” Sobel says, “whether they agree or not, that’s a very bad thing for themselves and the world.”