 He continued working five-day weeks until the day before he died, according to The Conference Board, and he was also an active member of the Business Cycle Dating Committee at the National Bureau of Economic Research.His final decision with the committee was the determination that the Late-2000s recession had begun in December 2007.In 2008, Zarnowitz published a book about his experiences with Nazis and Russians, "Fleeing the Nazis, Surviving the Gulag, and Arriving in the Free World