SIPRI's Research on Military Spending and Armaments

Military expenditure
Monitors developments in military expenditure worldwide and maintains the most comprehensive, consistent and extensive data source available on military expenditure.

The arms industry
Collects, describes and analyses data on arms sales and other economic indicators relating to the world’s major arms-producing companies, shedding light on an industry segment that generally lacks transparency.

International arms transfers
Monitors and analyses international transfers of major conventional arms, highlighting trends in supplier–recipient relationships and helping to identify potentially destabilizing build-ups of weapons and the sources of weapons used in conflicts.