South Korean President Park Geun-hye called Thursday for closer macroeconomic coordination and partnership among the world\'s top economies, urging advanced countries to be more careful when changing their monetary policies. Park made the appeal during the opening session of the summit of the Group of 20 major economies in Russia\'s second-largest city of Saint Petersburg, saying economies around the world are interlinked so much that it is difficult for any one of them to grow alone.