Sourabh Gupta's conceptual confusion

Comments on Sourabh Gupta “Obama visit to India: East Asia’s emerging security multilateralism”, 24/11/2010, http://www.eastasiaforum.org/2010/11/24/obama-visit-to-india-east-asia%e2%80%99s-emerging-security-multilateralism/
With great respect, there appear some conceptual confusions in this post.

For example, the following statement obvious was mistaken the US as an Asian economy that is not only confusing but clearly wrong:
"Third, with Asia likely to play host in the not-too-distant future to six of the dozen largest economies in the world – US, China, Japan, India, Russia and Korea, it is not altogether clear that the Asian equilibrium is about to greatly disturbed … let alone submit to a new geo-political hegemony bearing dragon-like features."

While some Asians might be delighted that the inclusion of the US as an Asian economy could increase the weight and importance of Asia, a false self delusion may actually cause even greater disappointment.

Has anyone, or any international organisation apart from the author of this post classified the US as an Asian economy? What is the basis for doing that?

Of course, it is noted that the topic is about the US and India that may provide a clue to this confusion. However, that should not be the excuse for the confusion to occur in the first place.