International knowledge sourcing: Evidence from U.S. firms expanding abroad

Recent research demonstrates that firms, motivated by national differences in technical activity, expand abroad to source unique knowledge. Extant research suggests that firms use a knowledge sourcing strategy to 'catch up' with competitors and to obtain 'technical diversity.' We widen the investigation by suggesting that firms also use knowledge sourcing as a springboard to reduce their next generation R&D costs-that firms would seek out similar R&D activity to combine with their own. Using unique data that encompasses the multitude of countries where U.S. firms invest, we test the importance of these explanations. Measuring knowledge via patent stocks, we find that country-industries with larger stocks and greater technical similarity to the United States are more attractive. These findings suggest that an important explanation for firms investing abroad is not catching up or technologically diversifying, but is using similar R&D efforts of others to overcome fixed R&D cost hurdles.