Agency theories predict that older firms make value‐destroying acquisitions to benefit managers. Neoclassical theories predict instead that such firms make wealth‐increasing acquisitions to exploit underutilized assets. Using IPO cohorts, we establish that, while younger firms make more related and diversifying acquisitions than mature firms, the acquisition rate follows a U‐shape over firms’ life cycle. Consistent with neoclassical theories, we show that acquiring firms have better performance and growth opportunities and create wealth through acquisitions of nonpublic firms throughout their life. Consistent with agency theories, older firms experience negative stock price reactions for acquisitions of public firms.

From 1998 to 2011, U.S. firms held more cash on average (but not at the median) than similar foreign firms (foreign twins) did. The average difference in cash holdings does not increase after 2008, and it is driven by highly R&D-intensive U.S. firms. Because there are almost no similarly R&D-intensive foreign firms, mean comparisons involving these U.S. firms are not reliable. Without these U.S. firms, neither U.S. multinational firms nor purely domestic U.S. firms hold more cash than their foreign twins do. Country characteristics have negligible explanatory power for differences in cash holdings between U.S. firms and their foreign twins.