| 1 (484) | National Bureau of Economic Research | USA |  |
| 2 (623) | Santa Fe Institute | USA | |
| 3 (646) | American Institute of Aeronautics and Astronautics | USA | |
| 4 (695) | Carnegie Institution for Science | USA | |
| 5 (700) | International Computer Science Institute | USA | |
| 6 (736) | Institute for Advanced Study | USA | |
| 7 (836) | SRI International | USA | |
| 8 (926) | Kavli Institute for Particle Astrophysics and Cosmology | USA | |
| 9 (1040) | Woods Hole Oceanographic Institution | USA | |
| 10 (1052) | Marine Biological Laboratory | USA | |
| 11 (1095) | Regenstrief Institute | USA | |
| 12 (1263) | RAND Corporation | USA | |
| 13 (1511) | SETI Institute | USA | |
| 14 (1720) | Monterey Bay Aquarium Research Institute | USA | |
| 15 (1875) | Wildlife Conservation Society USA | USA | |
| 16 (2222) | Desert Research Institute, Reno | USA | |
| 17 (2363) | Louisiana State University Agricultural Center | USA | |
| 18 (2503) | International Monetary Fund | USA | |
| 19 (2632) | Battelle Memorial Institute | USA | |
| 20 (2666) | Educational Testing Service | USA | |
| 21 (2682) | Universities Space Research Association | USA | |
| 22 (2708) | Southwest Research Institute | USA | |
| 23 (3620) | Electric Power Research Institute | USA | |
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