, World History Center, University of Pittsburgh (emeritus), United States

• Journal of World-Systems Research Vol. 24 No. 1 (2018): Volume 24, Issue 1: Winter/Spring 2018 - World Historical Information
  Conference Report—"Creating Historical Knowledge Socially: New Approaches, Opportunities, and Epistemological Implications of Undertaking Research with Citizen Scholars”
  Abstract  PDF
• Journal of World-Systems Research Vol. 24 No. 1 (2018): Volume 24, Issue 1: Winter/Spring 2018 - World Historical Information
  Dataset Review—Zooniverse, the online repository for Citizen Science
  Abstract  PDF
• Journal of World-Systems Research Vol. 24 No. 2 (2018): Volume 24, Issue 2: Summer/Fall 2018 - World Historical Information
  Dataset Review—"Data-Planet: A Successful Private-Sector Data Resource"
  Abstract  PDF
• Journal of World-Systems Research Vol. 25 No. 2 (2019): Summer/Fall 2019 - World Historical Information
  Routes of Atlantic Slave Voyages: Revised Framework and New Insights
  Abstract  PDF  WHCDB-2017
• Journal of World-Systems Research Vol. 26 No. 1 (2020): Winter/Spring 2020 - World Historical Information
  Research Note on Captive Atlantic Flows: Estimating Missing Data by Slave-Voyage Routes
  Abstract  PDF  Slave Routes Datasets, 1650s-1860s