| Fattorini | Australian bird abudances. |
| Ganeshaiah | Indian dung beetles from Ganeshaiah et al. (1997) |
| k_hetang | Preemption parameter estimation by He and Tang |
| k_ls | Preemption parameter estimation by least squares regression |
| k_may | Preemption parameter estimation by the equation of May |
| k_ml | Preemption parameter estimation by maximum likelihood. |
| Mehrabi | Costa Rica dung beetle counts from Mehrabi et al. (2014) |
| preemption.fit | Estimation of the preemption parameter of a geometric series by various methods |
| preemption.t | Preemption t test |
| raplot | Rank-abundance plot |
| raplot.paired | Rank-abundance plot for two samples |