Do foreign mergers and acquisitions boost firm productivity?

This paper examines the causal relationship between foreign mergers and acquisitions and firm productivity in the UK over the period 1999-2007. Our results raise questions about the existence of aggregate effects of foreign ownership on TFP in the longer-run. However, we find significant heterogeneity in the TFP effects of foreign M&A at the industry level. Overall, we uncover a systematic pattern of post-acquisition TFP effects that is consistent with the most recent theoretical models of firm heterogeneity and cross-border mergers and acquisitions as mode of foreign entry. Furthermore, we find positive aggregate effects on labor productivity due to capital deepening but not due to changes in TFP.