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gravity (version 1.1)
Estimation Methods for Gravity Models
Description
A wrapper of different standard estimation methods for gravity models. This package provides estimation methods for log-log models and multiplicative models.
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1.1
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Install
install.packages('gravity')
Monthly Downloads
501
Version
1.1
License
Apache License (>= 2)
Maintainer
Mauricio Vargas
Last Published
May 2nd, 2023
Functions in gravity (1.1)
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nls
Non-linear Least Squares (NLS)
nbpml
Negative Binomial Pseudo Maximum Likelihood (NBPML)
tetrads
Tetrads
gravity_zeros
Gravity dataset without zero trade flows
log_distance
Apply logarithm to distance column
ols
Ordinary Least Squares (OLS)
ppml
Poisson Pseudo Maximum Likelihood (PPML)
sils
Structural Iterated Least Squares (SILS)
hm_summary
Head and Mayer consistent summary statistics
tobit
Left-censored Tobit model with known threshold
et_tobit
Eaton1995;textualgravity threshold Tobit model (ET Tobit)
bvu
Bonus vetus OLS (BVU)
ek_tobit
Eaton2001;textualgravity Tobit model (EK Tobit)
ddm
Double Demeaning (DDM)
discard_unusable
Discard non-positive and/or non-finite observations in datasets
fixed_effects
Fixed Effects
gravity_no_zeros
Gravity dataset without zero trade flows
gpml
Gamma Pseudo Maximum Likelihood (GPML)
bvw
Bonus vetus OLS (BVW)
gravity-exports
gravity exported operators and S3 methods The following functions are imported and then re-exported from the gravity package to avoid listing Depends of gravity.