Available sources value transfers of weapons irrespective of whether t
hey are paid for and how. Data from the U.S. indicates that the shares
of arms given for free or on credit are high. If other arms exporters
, all military aid and all credits used for military purposes are cons
idered, which is done here on the basis of rough estimates and an oppo
rtunity cost model, the true cash costs of weapons in the year of the
actual transfer are small. On the other hand, the financial burden of
earlier arms imports via debt service has grown over time. It most pro
bably exceeded the true cash cost of imports of arms in the late 1980s
. Large differences between arms transfer data and the actual true cos
ts of arms transfers means that analysis of the economic effects of ar
ms imports without considering these financial aspects makes little se
nse.