*** Regression 1
reg  grmad8098 lypcmad80 govern8590 sanctions proximate ly80 malhigh pat8590 if core80~=1

*** Regression 2 (dropping Botswana and North Korea)
reg  grmad8098 lypcmad80 govern8590 sanctions proximate ly80 malhigh pat8590 if core80~=1 & botswana~=1 & koreadr~=1