- Zachary Moses Schrag, “Nineteen Nineteen: The Boston Police Strike in the Context of American Labor” (A.B. thesis, Harvard University, 1992). (PDF version, March 2012)
- I am currently researching nineteenth-century riots, particularly the Philadelphia riots of 1844. I have written a reference entry on the riots: “Nativist Riots of 1844,” Encyclopedia of Greater Philadelphia, first posted 2013.