Figure 6.

The neutral site frequency spectrum for different values of α and fixed population size $N={10}^5$. When $1<\alpha <2$, the rare-end spectrum and the frequent-end spectrum are $\propto \frac{1}{x^{3-\alpha }}$ and $\propto \frac{1}{{(1-x)}^{2-\alpha }}$, respectively (see also Figure 7).