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A non-equilibrium neutral model for analysing cultural change.(Report)

Kandler, Anne ; Shennan, Stephen

Journal of Theoretical Biology, August 7, 2013, Vol.330, p.18(8) [Periódico revisado por pares]

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  • Título:
    A non-equilibrium neutral model for analysing cultural change.(Report)
  • Autor: Kandler, Anne ; Shennan, Stephen
  • Assuntos: Archaeology -- Analysis
  • É parte de: Journal of Theoretical Biology, August 7, 2013, Vol.330, p.18(8)
  • Descrição: To link to full-text access for this article, visit this link: http://dx.doi.org/10.1016/j.jtbi.2013.03.006 Byline: Anne Kandler, Stephen Shennan Abstract: Neutral evolution is a frequently used model to analyse changes in frequencies of cultural variants over time. Variants are chosen to be copied according to their relative frequency and new variants are introduced by a process of random mutation. Here we present a non-equilibrium neutral model which accounts for temporally varying population sizes and mutation rates and makes it possible to analyse the cultural system under consideration at any point in time. This framework gives an indication whether observed changes in the frequency distributions of a set of cultural variants between two time points are consistent with the random copying hypothesis. We find that the likelihood of the existence of the observed assemblage at the end of the considered time period (expressed by the probability of the observed number of cultural variants present in the population during the whole period under neutral evolution) is a powerful indicator of departures from neutrality. Further, we study the effects of frequency-dependent selection on the evolutionary trajectories and present a case study of change in the decoration of pottery in early Neolithic Central Europe. Based on the framework developed we show that neutral evolution is not an adequate description of the observed changes in frequency. Author Affiliation: (a) Department of Mathematical Science, City University London, Northampton Square, London EC1V 0HB, UK (b) Santa Fe Institute, 1399 Hyde Park Road, Santa Fe, NM 87501, USA (c) Institute of Archaeology, University College London, 31-34, Gordon Square, London WC1H 0PY, UK Article History: Received 10 April 2012; Revised 2 March 2013; Accepted 8 March 2013
  • Idioma: English

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