o&r militarized dispute
democracy score (lesser of pair
economic growth
allied dummy
contiguity dummy
capability ratio
dyadic trade
# of years of peace (o&r)
calendar year
unique dyad#-orstatea orstateb
particular dyad-year observed
1=continuing cow war, else 0
# of previous disputes (o&r)
# of obs before dispute (b&t)
years of peace, restart with ne
original yearin, no restart
group(ordyid prefail)
yearout - 1
dispute last yr  (1yes 0no .=fi
dispute this year and last
(py-k1) cubed
(py-k2) cubed
(py-k3) cubed