Estimation Methods for Gravity Models


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Documentation for package ‘gravity’ version 0.6

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BVU Bonus vetus OLS, BVU
BVW Bonus vetus OLS, BVW
DDM Double Demeaning, DDM
EK_Tobit Eaton and Kortum (2001) Tobit model, EK_Tobit
ET_Tobit Eaton and Tamura (1994) threshold Tobit model, ET_Tobit
Fixed_Effects Fixed_Effects
GPML Gamma Pseudo Maximum Likelihood, GPML
Gravity_no_zeros Gravity dataset without zero trade flows
Gravity_zeros Gravity dataset with zero trade flows
NBPML Negative Binomial Pseudo Maximum Likelihood, NBPML
NLS Nonlinear Least Squares, NLS
OLS OLS
PPML Poisson Pseudo Maximum Likelihood, PPML
SILS Structural Iterated Least Squares, SILS
Tetrads Tetrads
Tobit Left-censored Tobit model with known threshold