Tinbergen, Jan (yän tĭnˈbĕrˌgən) [key], 1903–94, Dutch economist, co-winner with Ragnar Frisch of the first Nobel Memorial Prize in Economic Sciences (1969). A graduate of Leiden Univ. (1929), he worked (1929–45) with the Dutch government's Central Bureau of Statistics, and was briefly an adviser to the League of Nations (1936–38). He also served (1945–55) as director of the Dutch central planning bureau. He was a professor (1933–73) at the Netherlands School of Economics in Rotterdam. His publications include Economic Policy: Principles and Design (1956), Shaping the World Economy (1963), and Development Planning (1967).