Arthur Twining Hadley (/ˈhædliː/ ⓘ, HAD-lee;[1] April 23, 1856 – March 6, 1930[2]) was an American economist who served as President of Yale University from 1899 to 1921.His idea of the broad scope of economic science, especially of the place of ethics in relation to political economy and business, is expressed in his writings and public addresses.When the coffin was opened prior to burial, Hadley was clothed in a yellow Japanese kimono with a samurai sword placed alongside.In his books, he endeavored to utilize the results of economic and political history as a basis for a working system of ethics for a democracy like that of the United States.[8] Among his works are: An annual tradition during Yale College Class Day, the Arthur Twining Hadley Prize is "awarded to the graduating senior majoring in the social sciences who ranks highest in scholarship.