Marianne F. Johnson is Professor of Economics at the University of Wisconsin, Oshkosh. She is co-editor of the series Research in the History of Economic Thought and Methodology and has co-edited two multi-volume projects on early American economic thought.

William H. Perry is a professional lexicographer with more than thirty years experience in constructing and searching large evidentiary and documentary research databases for special projects. For this work, Mr Perry constructed a database containing, in machine-readable format, all significant philosophical, religious, scientific, political, and economic primary and secondary sources from the beginnings of Western and Middle Eastern civilization until the end of the nineteenth century, searchable by concept.