Estimation Methods for Gravity Models

bvu | Bonus vetus OLS (BVU) |

bvw | Bonus vetus OLS (BVW) |

ddm | Double Demeaning (DDM) |

discard_unusable | Discard non-positive and/or non-finite observations in... |

ek_tobit | \insertCiteEaton2001;textualgravity Tobit model (EK Tobit) |

et_tobit | \insertCiteEaton1995;textualgravity threshold Tobit model (ET... |

fixed_effects | Fixed Effects |

gpml | Gamma Pseudo Maximum Likelihood (GPML) |

gravity-exports | gravity exported operators and S3 methods The following... |

gravity_no_zeros | Gravity dataset without zero trade flows |

gravity_zeros | Gravity dataset without zero trade flows |

hm_summary | Head and Mayer consistent summary statistics |

log_distance | Apply logarithm to distance column |

nbpml | Negative Binomial Pseudo Maximum Likelihood (NBPML) |

nls | Non-linear Least Squares (NLS) |

ols | Ordinary Least Squares (OLS) |

ppml | Poisson Pseudo Maximum Likelihood (PPML) |

sils | Structural Iterated Least Squares (SILS) |

tetrads | Tetrads |

tobit | Left-censored Tobit model with known threshold |

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