This paper considers the impact of international taxation on patterns of fo
reign direct investment and on the extent of international tax avoidance ac
tivity. Recent evidence indicates that taxation significantly influences th
e location of foreign direct investment, corporate borrowing, transfer pric
ing, dividend and royalty payments, and R&D performance. Reactions to world
wide tax rate differences, as well as to changes in international tax rules
, provide important information concerning the extent to which tax-payers r
espond to incentives. The generally high degree of responsiveness in turn c
arries implications for the design of domestic as well ns international tax
policy.