On December 13th, 2009 (October 27th, 2009 in the lunar calendar), Samuelson, the first American Nobel Prize in Economics, died. Paul A. Samuelson, a leading American economist, died at his home in Massachusetts, USA on December 13th at the age of 94. Samuelson is the first American economist to win the Nobel Prize in Economics. His classic book Economics has sold more than 4 million copies worldwide in more than 40 languages. It is the best-selling textbook in the world and has influenced an entire generation. It is also his book that systematically brought western economic theory into China for the first time, and made this way of thinking and vision take root in China. Samuelson can be said to be ubiquitous in the field of economics, and is called the last generalist in the field of economics. On the same day, the Associated Press summarized Samuelson's main achievements in his life, saying: He introduced mathematical analysis methods into economics, helped the Kennedy administration, which came to power in economic difficulties, formulate the famous "Kennedy Tax Reduction Plan", and wrote a textbook regarded as a classic by millions of college students. Samuelson was born in an economist family. His nephew is Summers, the chief economic adviser of US President Barack Obama, and his brother Robert and sister Anita are also well-known economists. Samuelson has been at MIT since 1940, and his death has caused many former students and friends to sigh. Susan hawkfield, president of MIT, said on the 13th: Samuelson "changed everything he touched". Comment: The last generalist in economics!