ARG | Ancestral recombination graph |

*f* | The relative contribution of gene conversion *vs*. crossing over, *f* = ρ_{g}/ρ_{c} |

| A composite-likelihood estimate of *f* (Hudson 2001) |

| A pattern-matching-based estimate of *f* (*cf*. Padhukasahasram *et al*. 2004) |

*h* | Observed number of haplotypes |

*l* | Locus length |

*L* | Tract length |

LD | Linkage disequilibrium |

*L*_{PAC} | The PAC likelihood function (Li and Stephens 2003) |

PAC | The product of approximate conditionals (Li and Stephens 2003) |

μ | The per generation rate of mutation |

*n* | Number of sampled chromosomes |

*r* | The per generation rate of recombination |

_{Lamarc} | An estimate of the per generation rate of recombination (Kuhner *et al*. 2000) |

*R*_{h} | An estimate of the number of recombination events at a locus (Myers and Griffiths 2003) |

*R*_{l} | An estimate of the number of recombination events at a locus (Song *et al*. 2005) |

*R*_{m} | An estimate of the number of recombination events at a locus (Hudson and Kaplan 1985) |

*R*_{s} | An estimate of the number of recombination events at a locus (Myers and Griffiths 2003) |

*R*_{u} | An estimate of the number of recombination events at a locus (Song *et al*. 2005) |

ρ | The population recombination parameter, 4*N*_{e}*r* |

ρ_{c} | The population recombination parameter due to crossover |

ρ_{g} | The population recombination parameter due to gene conversion |

_{FD02} | An approximate-likelihood estimate of ρ (Fearnhead and Donnelly 2002) |

_{H01} | A composite-likelihood estimate of ρ (Hudson 2001) |

_{Lamarc} | A full-likelihood estimate of ρ (Kuhner *et al*. 2002) |

_{LS03} | The PAC-likelihood estimate of ρ (Li and Stephens 2003) |

_{MAF02} | A composite-likelihood estimate of ρ (McVean *et al*. 2002) |

_{T05} | A summary statistic-based estimate of ρ (Haddrill *et al*. 2005) |

_{W00} | A summary statistic-based estimate of ρ (Wall 2000) |

*s* | The rate of self-fertilization |

*S* | Number of segregating sites |

*S*_{p} | Number of parsimony informative segregating sites |

*T* | Tajima's *D* (Tajima 1989) |

θ | The population mutation parameter, 4*N*_{e}μ |

_{FD02} | θ coestimated with ρ (Fearnhead and Donnelly 2002) |

_{Lamarc} | θ coestimated with ρ (Kuhner *et al*. 2002) |

π | An estimate of θ based on pairwise differences (Tajima 1983) |

_{T05} | θ coestimated with ρ (Haddrill *et al*. 2005) |

_{W} | An estimate of θ based on the number segregating sites (Watterson 1975) |