KOR designates RKO since 1949
RUS designates SUN between 1949 and 1991
CZE designates CZS between 1949 and 1992
DEU designates FRG between 1949 and 1989
the countries with no entry cost data are mainly small probably not in service trade data.
data drawn from WDI for the year 2005 (earliest year available).
gdpppp95 data for Bosnia/Herzegovina; Bhutan; Brunei; */
Interstate, CIVIL and extrastate wars, by nation year, when multiple wars then only consider largest (by deaths)
dropped Germany (ccode = 255) for lack of data, added missing cases for Czechoslovakia to match to cyear2 data
wbgdp gives federal republic data for Germany. unclear if Czech data refers to Czechoslovakia or only the Czech part.
Exceptions to averaging deaths over conflict years include Rwanda and Nagorno Karabagh.
For c variable, pre-1973 values are set 1973 value if missing
All interaction terms are from centered component variables
data drawn from WDI for the years 2005 (earliest year available) - 2010.