<b>On language change</b> : The invisible hand in language. By Rudi Keller. London &amp; New York: Routledge, 1994. Pp. ix, 182.

Part One 1. The problem of language change 2. Conjectural history 3. In the prison of dichotomies Part Two 4. The working of the invisible hand 5. Discussion 6. Summing up