Would some PEN-L comrade be kind enough to instruct me on how I might access time series data (for the U.S.) on 1) aggregate capital/output ratios both a) capital stock/GDP and b) capital depreciation/GDP 2) labor productivity. In a departure from my accustomed practice of shameless neglect of empirical details I need some facts here. I will be very grateful for some direction on how to locate them! Venceremos, Frank Thompson Department of Economics University of Michigan Ann Arbor, Michigan 48109