In the United States, Clark's primary legacy is one of ongoing cooperation between the two colleges he founded, now the University of Massachusetts Amherst and the Hokkaido University. Student and faculty exchanges were informal for many years until, according to journalist Daniel Fitzgibbons, the early 1960s when "the U.S. State Department contracted with the University to help strengthen the agricultural curriculum at Hokkaido. Through that program, 11 UMass faculty went to Sapporo and 52 Japanese faculty and students received advanced training in Amherst." Both universities maintain exchange programs through various academic departments.