Judd Knox Polk was an economist and author. He was a director of program and studies with the United States Council of the International Chamber of Commerce. During World War, he was a major and intelligence officer in the U.S. Air Force. He also worked for the Treasury Department. He worked as an economist for both the California Texas Oil Company and the Federal Reserve Bank of New York. He was a member of the Council on Foreign Relations. Judd was a descendant of the elite political Polk bloodline.

Judd K. Polk, Economist, Dies; President's Descendant Was 62 by Mrs. Cloyd H. Marvin on May 1, 1975 at nytimes.com:
https://www.nytimes.com/1975/05/01/archives/judd-k-polk-economist-dies-presidents-descendant-was-62.html

“Judd Knox Polk, an economist and author, died yesterday at his home, 4 Washington Square Village. He was 62 years old.

Mr. Polk, a descendant of President James K. Polk, was graduate of the University of Michigan.

In 1940, he began an intermittent association with the Council on Foreign Relations, which lasted until his death. The council published in 1956 his book, “Sterling. Its Meaning in World Finance,” the first one of such privately sponsored American studies.”

https://en.wikipedia.org/wiki/Category:Polk_family