peacesciencer (version 0.5.0)

add_cow_trade: Add Correlates of War trade data to a dyad-year or state-year data frame

Description

add_cow_trade() allows you to add Correlates of War alliance data to a dyad-year data frame

Usage

add_cow_trade(data)

Arguments

data

a dyad-year data frame (either "directed" or "non-directed") or a state-year data frame

Value

add_cow_trade() takes a dyad-year data frame or state-year data frame and adds information about the volume of trade in that given dyad-year or state-year. For the state-year data, these are minimally the sum of all imports and the sum of all exports. For dyad-year data, this function returns the value of imports in current million USD in the first country from the second country (and vice-versa) along with their "smooth" equivalents.

Details

For the dyad-year data, there must be some kind of information loss in order to work within the limited space available to this package. This package loads a truncated version of the data in which the trade values are rounded to integers in order to greatly reduce the disk space for this package. I do not think this to be terribly problematic, though I admit I do not like it. If this is a problem for your research question, you may want to consider not using this function for dyad-year data.

References

Barbieri, Katherine, Omar M. G. Keshk, and Brian Pollins. 2009. "TRADING DATA: Evaluating our Assumptions and Coding Rules." Conflict Management and Peace Science. 26(5): 471-491.

Examples

# NOT RUN {
# }
# NOT RUN {
# just call `library(tidyverse)` at the top of the your script
library(magrittr)

cow_ddy %>% add_cow_trade()
# }