The World Bank and the International Monetary Fund will meet in Washington, D.C. Saturday and Sunday. One subject for discussion will be falling expectations for world economic growth. A new report by the I.M.F. estimates that the world economy will shrink by one and three-tenths percent this year. That would be the worst performance in more than sixty years. Three months ago, the I.M.F. predicted a small growth for this year. Major industrialized economies are expected to see the biggest decreases, shrinking by almost four percent. The I.M.F. predicts developing economies will continue to grow for the year, but only by about one and one-half percent. The I.M.F. says the world will slowly return to growth of almost two percent next year. But the lending organization warns that strong policies to supervise and support the financial system are needed if the world economy is to fully recovery. Olivier Blanchard is the chief economist for the I.M.F. He has said that banks are still in the process of rebuilding their financial positions. He added that securities markets are still operating poorly. Economic experts believe the world financial industry is moving towards recovery but with more losses to come. In all, the I.M.F. says worldwide financial losses could be as high as four trillion dollars by the end of next year. World trade is expected to drop eleven percent this year, after expanding by three percent last year. The I.M.F. report says international lending may not fully recover until two thousand eleven. The financial crisis has made the I.M.F. more important than ever. The world's largest economies promised to increase the size of the fund by about five hundred billion dollars. They did so at the G-Twenty meeting in London earlier this month. This week, President Obama proposed that the United States lend the I.M.F. one hundred billion dollars as part of that promise.