Eurostat
https://ec.europa.eu/eurostat/web/main
Eurostat is the statistical office of the European Union and collects a dizzying array statistical information on member states of the EU and other selected countries (e.g. non-EU OECD members, non-EU members in Eastern Europe). Much of their data are accessible on-line at https://ec.europa.eu/eurostat/data/database and cover topics such as demographics, balances of payments, socio-economic indicators, and much data for sub-national regions within EU member states.
International Monetary Fund (IMF) Macroeconomic and Financial Data
https://data.imf.org/
The IMF's data library covers topics such as investment flows, monetary aggregates, economic output, commodity prices, exchange rates, public finances, financial institutions and markets, and both public and private debt. The available databases include the Balance of Payments Statistics, the Direction of Trade Statistics, the Government Finance Statistics, and the International Financial Statistics. The Fund also has a data portal at https://www.imf.org/en/Data for access to other IMF data collections and sites.
OECD iLibrary (Organization for Economic Cooperation and Development)
https://www.oecd-ilibrary.org/
The OECD iLibrary is an online interface that provides full-text access to OECD studies, periodicals, and dozens of statistical databases. The topical range of the iLibrary is considerable and covers areas such as agricultural policies, environmental indicators, social expenditures, labour markets, national accounts, foreign trade and FDI, and various industry-level data. While its focus is on wealthier developed countries, the iLibrary also includes OECD reports and publications on selected non-member countries such as the BRIC countries of Brazil, Russia, India, and China. This resource is also available via Databases at Emory.
United Nations Commodity Statistics Trade Database (Comtrade)
https://comtrade.un.org/
The UN's Comtrade database is a good source for commodity-specific bilateral trade data. Users can create their own extracts of data for both value and quantity of trade using different industrial classification codes and download those extracts for later use. Comtrade now also includes data on trade in services. This resource is also available via Databases at Emory.
UNCTADStat
https://unctadstat.unctad.org/EN/
The United Nations Conference on Trade and Development (UNCTAD) maintains a database on FDI statistics, including flows, stocks, and participation in international investment-related agreements. It covers the years 1970 onward and allows users to download data into Microsoft Excel. UNCTAD's World Investment Reports are another useful source for FDI flows and stocks. UNCTAD's FDI data are part of a database on economic data more generally, including data on macroeconomic indicators, trade flows and trade restrictions, remittances, and commodity prices.
World Development Indicators (World Bank)
https://datacatalog.worldbank.org/search/dataset/0037712
The World Development Indicators provide convenient access to hundreds indicators on over 200 countries and territories. Data are available annually from 1960 forward, with variation across countries and indicators. The database is part of the Bank's Data Catalog of statistical databases and other data collections. There are also multiple tools available for importing WDI data directly into programs such as R and Stata.
World Economics and Politics (WEP) Dataverse
https://ncgg.princeton.edu/wep/dataverse.html
The WEP Dataverse is a joint undertaking by scholars at the University of Southern California and at Princeton. The Dataverse "provides researchers the ability to download custom datasets with information about the political and economic characteristics of countries," such as data on trade flows and policies, financial openness, central bank indepedence, regime types and political institutions, and basic socio-economic indicators. Most of the data are by country-year, but some of the data are bilateral and between countries (e.g. alliances, trade agreements, and similarity of votes in the UN General Assembly). Documentation for the data is available at https://ncgg.princeton.edu/wep/download.html. See also the International Political Economy Data Resource, which is a precursor to the WEP Dataverse.
World Integrated Trade Solution (WITS)
https://wits.worldbank.org/default.aspx
WITS is a joint undertaking of UNCTAD, the World Bank, and the World Trade Organization to integrate various databases on trade flows and trade restrictions. The WITS databases provide information on tariff schedules, non-tariff measures, and bilateral trade and tariff levels. Registration is required to use the WITS interface, but that registration is free of cost.