| 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 |