This study analyses trade flows in intermediate goods and services among OECD countries and with
their main trading partners. Combining trade data and input-output tables, bilateral trade in intermediate
goods and services is estimated according to the industry of origin and the using industry for the period
1995-2005. Trade in intermediate inputs takes place mostly among developed countries and represents
respectively 56% and 73% of overall trade flows in goods and services. Gravity regressions indicate that in
comparison to trade in final goods and services, imports of intermediates are more sensitive to trade costs
and are less attracted by bilateral market size. Further findings are that the activities of multinational
enterprises can be associated with higher trade flows of intermediate inputs and with a higher ratio of
foreign to domestic inputs in using industries. Results from production function regressions and from a
stochastic frontier analysis suggest that a higher share of imported inputs leads to productivity gains in
domestic industries and reduces inefficiencies in the use of technology.
