Nobuyuki Takahashi, Rie Mashima. Do forms and structures of exchange affect solidarity?. Working Paper (Hokkaido Univ. Press, Hokkaido, Japan). 2006
Nobuyuki Takahashi, Rie Mashima. The Emergence of Indirect Reciprocity: Is the Standing Strategy the Answer?. Working Paper (Hokkaido Univ. Press, Hokkaido, Japan). 2006