| An economic analysis of a National Theatre : The case of the ‘Abbey’ | O'Hagan, John W. | Article in Journal | | 1996 |
| Consumption and living conditions, 1750–2016 | Bielenberg, AndyO'Hagan, John | Article in Book | | 2016 |
| The Arts and the Wealth of Nations: the Role of the State | O'Hagan, John | Article in Journal | | 2009 |
| The economy | Murphy, PatrickO'Hagan, JohnRedmond, Adrian | Article in Book | | 2000 |
| The economy of Ireland : national and sectoral policy issues | | Monograph or Collective Volume | Gill & Macmillan | 2008 |
| The Irish economy 1973 to 2016 | O'Hagan, John | Article in Book | | 2018 |
| Trinity/UCD rugby in the late 1960s | O'Hagan, John | Article in Book | | 2003 |