Henry S. Rowen, an economist and a military expert who led the RAND Corporation in the 1960s, expanding its research mission to include domestic policy, and who resigned abruptly in 1971 after a RAND copy of the top-secret Pentagon Papers was leaked to the news media by Daniel Ellsberg, died on Nov. 12 2015 in Menlo Park, Calif. He was 90. Mr. Rowen, an analyst with RAND in the 1950s, became its president in 1967 after working on NATO strategy in the Defense Department for several years. Mr. Rowen had been a close friend of and mentor to Mr. Ellsberg, from their time at RAND in the late 1950s. He had steered contracting work to Mr. Ellsberg at the Defense Department, brought him back to RAND as a strategic analyst soon after becoming its president and authorized him to work on the Pentagon study. In November 1971, Mr. Rowen announced his resignation. Mr. Rowen left RAND to study economics at Oxford but returned after earning a master’s degree in 1955 and continued writing on issues including nuclear strategy, international security and the emerging economies of Asia. Henry Stanislaus Rowen, known as Harry, was born on Oct. 11, 1925, in Boston. He earned a bachelor’s degree in business and engineering administration from the Massachusetts Institute of Technology in 1949, then served a management internship at the Barnsdall Oil Company before joining RAND as an economist. Henry S. Rowen, a senior fellow at the Hoover Institution, was a professor of public policy and management at Stanford University's Graduate School of Business and a member of that university's Asia/Pacific Research Center. He was codirector of Stanford's Program on Regions of Innovation and Entrepreneurship. In addition to his son Chris, Mr. Rowen, who lived in Palo Alto, Calif., is survived by his wife, the former Beverly Griffiths; his daughters, Hilary, Sheila and Diana Rowen; two other sons, Michael and Nicholas; and nine grandchildren.