While researching something else, I found this:

Chang, C. C., Hsu, S. D., Lee, J. J., Tellier, L. C., Yang, R., & Zhao, B. BGI Cognitive Genomics Lab: Prxoposal for Gene-Trait Association Study of g.

https://www.cog-genomics.org/static/pdf/bgi_g_proposal.pdf