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## ----setup, cache = FALSE, echo = FALSE, message = FALSE, warning = FALSE, tidy = FALSE----
knitr::opts_chunk$set(eval = TRUE, message = FALSE, warning = FALSE)
## ----ddm----------------------------------------------------------------------
library(gravity)
fit <- ddm(
dependent_variable = "flow",
distance = "distw",
additional_regressors = c("rta", "comcur", "contig"),
code_origin = "iso_o",
code_destination = "iso_d",
data = gravity_no_zeros
)
summary(fit)
## ----bvu----------------------------------------------------------------------
fit2 <- bvu(
dependent_variable = "flow",
distance = "distw",
additional_regressors = c("rta", "contig", "comcur"),
income_origin = "gdp_o",
income_destination = "gdp_d",
code_origin = "iso_o",
code_destination = "iso_d",
data = gravity_no_zeros
)
summary(fit2)
## ----bvw----------------------------------------------------------------------
fit3 <- bvw(
dependent_variable = "flow",
distance = "distw",
additional_regressors = c("rta", "comcur", "contig"),
income_origin = "gdp_o",
income_destination = "gdp_d",
code_origin = "iso_o",
code_destination = "iso_d",
data = gravity_no_zeros
)
summary(fit3)
## ----ppml---------------------------------------------------------------------
fit4 <- ppml(
dependent_variable = "flow",
distance = "distw",
additional_regressors = c("rta", "comcur", "contig"),
data = gravity_no_zeros
)
summary(fit4)
## ----ppmlr--------------------------------------------------------------------
fit4r <- ppml(
dependent_variable = "flow",
distance = "distw",
additional_regressors = c("rta", "comcur", "contig"),
robust = TRUE,
data = gravity_no_zeros
)
summary(fit4r)
## ----gpml---------------------------------------------------------------------
fit5 <- gpml(
dependent_variable = "flow",
distance = "distw",
additional_regressors = c("rta", "comcur", "contig"),
robust = TRUE,
data = gravity_no_zeros
)
summary(fit5)
## ----nbpml--------------------------------------------------------------------
fit6 <- nbpml(
dependent_variable = "flow",
distance = "distw",
additional_regressors = c("rta", "comcur", "contig"),
robust = TRUE,
data = gravity_no_zeros
)
summary(fit6)
## ----tetrads------------------------------------------------------------------
fit8 <- tetrads(
dependent_variable = "flow",
distance = "distw",
additional_regressors = "rta",
code_origin = "iso_o",
code_destination = "iso_d",
filter_origin = "CHN",
filter_destination = "USA",
data = gravity_no_zeros
)
summary(fit8)
## ----tetrads2-----------------------------------------------------------------
fit8 <- tetrads(
dependent_variable = "flow",
distance = "distw",
additional_regressors = "rta",
code_origin = "iso_o",
code_destination = "iso_d",
filter_origin = "CHN",
filter_destination = "USA",
multiway = TRUE,
data = gravity_no_zeros
)
summary(fit8)
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