This part of “The Database” contains a guide to help
newcomers start using the database. An essay explains in
detail the sources and methods used in constructing the database and
creating the set of estimates based on it. A list of the variables
in the version of the database on this website is provided. Lastly,
the user will find a comprehensive bibliography of primary and
secondary sources consulted in creating the database.
This link takes you to the page for querying the main database.
You can search for information about a specific voyage, a small group
of voyages, or a large subset of the data set, such as all voyages under
the Portuguese flag. There is a choice between a smaller “basic” set of
25 variables and a larger “general” set of 64 variables. Each set groups
variables into the same eight categories. The interface of the query
section is designed to be as intuitive as possible, but many of the
FAQs are about how to use its features.
The variables accessible online
cover the full range of information available in the database.
Some users will want to work with variables that have not been
included in the selection for the website and/or use spreadsheets or
statistics software to analyze the data. This link takes you to a
page with buttons to download the full set of variables in the
Trans-Atlantic Slave Trade Database in SPSS format, a PDF copy of
the SPSS codebook, and the website version of the database in three
formats (SPSS, csv, and dBase).
The “Contribute” section consists of data entry forms by which
users of the website can supply new information or revise existing
information on trans-Atlantic slaving voyages. Specialists on the
slave trade will review submissions of new or revised information.
Once confirmed, the new or revised information will be incorporated
in the next revision of the database appearing in the website.
We anticipate releasing a new revision every three years.