TY - JOUR AU - Summers,Robert AU - Heston,Alan TI - The Penn World Table (Mark 5): An Expanded Set of International Comparisons, 1950-1987 JF - National Bureau of Economic Research Reprint Series VL - No. 1562 PY - 1991 Y2 - May 1991 UR - http://www.nber.org/papers/r1562 N1 - Author contact info: Robert Summers Department of Economics 329 McNeil University of Pennsylvania Philadelphia, PA 19104-6297 E-Mail: rsummers@econ.upenn.edu Alan Heston 433 12th St. SE Washington DC 20003 Tel: 202 543 6191 E-Mail: aheston@econ.upenn.edu AB - ER -