Works in Progress

• Innovation in Cultural Systems: Contributions from Evolutionary Anthropology, edited by M. J. O’Brien and S. J. Shennan. Cambridge, Mass.: MIT Press.
• The learning and transmission of hierarchical cultural recipes. Biological Theory (under review) (A. Mesoudi and M. J. O’Brien)
• The (pre)history of diversity within clades of North American projectile points. Biological Theory (under review) (R. L. Lyman, T. L. VanPool, and M. J. O’Brien)