1. Language change: Progress or decay?;Aitchison,1991
2. Perceptual and conceptual factors in abductive change;Andersen,1978
3. Center and periphery: Adoption, diffusion and spread;Andersen,1988
4. Learning from the behavior of others: Conformity, fads, and informational cascades;Bikhchandani;Journal of Economic Perspectives,1998
5. Culture and the evolutionary process;Boyd,1985