Wang says that as the biggest developing country and biggest developed country, the mutual economic relationship of the United States and China is having an impact on the entire world.

VOA: standard.2010.05.25

They developed new methods to get what they say are the best estimates yet for almost every country.

VOA: special.2010.04.14

"We have a moral imperative to do this. We are the greatest country that ever existed in the history of the world, the great economic leader of the developed world, but the only one that does have access to quality, affordable health care for our people, and we intend to do so,".

VOA: standard.2009.09.04