This paper investigates the relationships between actual arms transfers and conflict. It draws on a unique new data set not previously analyzed in the literature. Over 5000 actual transfers of weapons to 92 non-weapon-producing states have been coded, primarily from SIPRI sources, for the period 1950-1975. Scalogram analysis of NATO and WTO transfers indicates that classes of naval, land, and air weapons each follow Guttman scales of technological sophistication and firepower, and that suppliers follow those scales in their transfers, making the scales a useful policy indicator. There are progressively fewer transfers at the higher levels of sophistication, and the sophistication of weaponry transferred tends to escalate over time within major geographical regions. Where order shifts occur between the scales obtained for successive periods of a few years each, they are traceable to shifts in the production runs of the supplier states, and thus to the stocks of weaponry available for transfer. Otherwise, NATO and WTO transfers tend to follow the same scales in any given time period. 39 Downloaded by [McGill University Library] at 23:20 03 February 2015 40 W. H. BAUGH and M. L. SQUIRES