| ALL | APSA | MPSA | |
| Number of authors | 1.36 | 1.37 | 1.36 |
| Solo-authored | 70.9% | 71.2% | 70.7% |
| Affiliation rank | |||
| [1, 10] | 11.8% | 12.4% | 11.3% |
| [11, 100] | 39.9% | 41.3% | 38.9% |
| [101, N) | 48.3% | 46.2% | 49.8% |
| Any author has a publication | 43.7% | 53.5% | 36.8% |
| (No. publications) × (avg. impact factor) | 2.90 | 3.73 | 2.31 |
| Any author has a paper in SSRN | 16.2% | 19.9% | 13.5% |
| n | 29,142 | 12,070 | 17,072 |
Notes: Observations are at the article level. We use institution rankings from Hix (2004) and use the highest-ranking affiliation among the article authors. The variable (no. publications) × (avg. impact factor) refers to the total number of publications by the paper authors multiplied by the average journal impact factor for these publications.