The Groningen Growth and Development Centre (Netherlands) maintains a portal of economic historical data resources for international macroeconomic research. GGDC-hosted data can be used for work on: historical population trends, GDP and GDP per capita; long-run economic growth and development; economic performance and productivity; economic interdependencies, inputs and outputs; and industrial sectors, labour and income. The portal gives access to Penn World Table data (8.1); Maddison Historical Statistics; the Total Economy Database and the GGDEC 10-Sector Database. Full details are on this new Library resource page.