c skewed humped shape similar to that of the log-normal distribution, though many other distributions have been proposed. These include the gamma, Weibull, beta, Singh-Maddala, and Dagum. The last two both being members of the Dagum family of distributions. Bandourian, McDonald & Turley [Bandourain et

Evolutionary game dynamics is the study of frequency dependent selection (May- nard Smith & Price 1973, Maynard Smith 1982, Hofbauer & Sigmund 1988, Weibull 1995, Samuelson 1997, Cressman 2003). The fitness of individuals is not constant but depends on the composition of the population. Constant selecti