General Economic History
Note: In general, these categories are arbitrary and many of these can be useful for several other areas of research.
Measuring Worth – A wonderful site that allows one to compare value among different years, centuries, and countries.
Eh.net – All things economic history, published and updated by various organizations including the Economic History Association, the Economic History Society, The Cliometric Society, and the Economic and Business History Society.
Angus Maddison – Collection of Dr. Angus Maddison’s Research that includes global and country-specific aggregate statistics.
Essays in Economic and Business History – This is an open-access journal that publishes pieces on economic, business, and financial history.
Eh.net Encyclopedia – A great resource for initial research and overviews of research fields.
World Bank Archives – The link goes to their online archives, but they are also a great spot for on-site archival research with a ton of information on the World Bank and its activities in the last 50+ years.
Early America History
Colonial North America by Harvard Library – Great digital collection of sources for all types of colonial history, including religious, political, and economic.
Colonial Society of Massachusetts – This is their collection of publications which include many available online. Some are also available for purchase.
New York Historical Society Digital Collections – An outstanding collection of early American and Early Republic resources. It even has old family cookbooks, which are quite interesting.
Massachusetts Historical Society Online Collections – Another great online repository, especially for those interested in the American Revolution, the Adams Family, and the MA 54th Regiment during the Civil War.
Georgia Historic Newspapers – Digital archive of newspapers beginning in 1763 until 2017. Note: Also a great resource for general American history.
Atlantic World History
British History Online – Great for British, Atlantic, Early Modern, and Colonial history.
Dutch Prize Papers – Online collection of papers captured by English ships between 1652-1815. Excellent source for early modern economic history and other uses, including genealogy, military, and diplomatic history.
Sound Toll Registers – This is an online database for the Danish Sound Toll registers which effectively recorded most of the trade between the Baltic Sea and the Atlantic Ocean.
HathiTrust – A collection of sources and books from around the world. Will need an institutional login (if your institution is a partner) to download sources.