Career
She was the only female to attend the first United Nations Sub-Committee on National Income Statistics in December 1945, which led to the United Nations System of National Accounts. She so impressed Richard Stone with her grasp of national accounting that he insisted her name be added to the official report of the meeting. After her acquittal for "aiding Soviet spies" in the Gouzenko affair, often credited as a triggering event for the Cold War, she was ostracized from the Canadian Civil Service.
She went on to spend three years at Cambridge University when it was the epicentre of postwar national accounting.
In 1953 her book, a study of British wages and salaries in the interwar period, was published by Cambridge University Press. Chapman"s income dwindled and, suffering from arthritis, she committed suicide on 17 October 1963.