Using tests of a single equation model and cointegration techniques, t
his paper finds no evidence of a long run trade-off, and some evidence
of a short-run trade-off, between military spending and investment in
post-World War II United States data. The short-run trade-off is conf
ined to the 1949-1971 period, and may be the result of the sharp expan
sion and contraction of military outlays in connection with the Korean
and Vietnam Wars. In addition, cointegration techniques are used to i
dentify a possible long-run trade-off between military spending and co
nsumption.