| Essays in immigration economics and political economy | 6 |
| 11 / 2012 | 12 / 2012 | 01 / 2013 | 02 / 2013 | 03 / 2013 | 04 / 2013 | 05 / 2013 | |
| Essays in immigration economics and political economy | 1 | 0 | 1 | 0 | 0 | 0 | 3 |
| 1 | United States of America | 2 |
| 2 | China | 1 |
| 3 | Germany | 1 |
| 4 | Spain | 1 |
| 1 | Seattle | 2 |
| 2 | Cunit | 1 |
| 3 | Freiburg | 1 |
| 4 | Tianjin | 1 |