This paper formally examines the implications of international consump
tion risk sharing for a panel of industrialized countries. We theoreti
cally derive the international consumption insurance proposition in a
simple setup and show how to modify it in more complicated models. We
analyze the implications of the theory for pairs of countries and find
that aggregate domestic consumption is almost completely insured agai
nst idiosyncratic real, demographic, fiscal and monetary shocks over s
hort cycles, but that it covaries with these variables over medium and
long cycles. The cross equation restrictions imposed by the theory ar
e rejected. The policy implications are discussed.