John Helliwell is on CollEc

rank value
closeness 5337 4.58622
betweenness 3070 3.84828

co-authors

  1. Haifang Huang [phu198]
  2. Shun Wang [pwa1128]
  3. Andre Plourde [ppl27]
  4. Guy Mayraz [pma1124]
  5. Ralph Bryant [pbr261]
  6. Ross McKitrick [pmc85]
  7. Max Norton [pno271]
  8. Steven Durlauf [pdu117]
  9. Gordon Sparks [psp76]
  10. David Foot [pfo82]
  11. John Livernois [pli306]