| After the famine : emigration from Ireland, 1850-1913 | Hatton, Timothy J.Williamson, Jeffrey G. | Article in Journal | | 1993 |
| Economic convergence : placing post-famine Ireland in comparative perspective | Williamson, Jeffrey G. | Article in Journal | | 1994 |
| International migration, 1850-1939 : an economic survey | Hatton, Timothy J.Williamson, Jeffrey G. | Article in Book | | 1994 |
| Migration and the international labor market 1850-1939 | | Monograph or Collective Volume | Routledge | 1994 |
| The age of mass migration : causes and economic impact | Hatton, Timothy J.Williamson, Jeffrey | Monograph or Collective Volume | Oxford University Press | 1998 |