The document discusses internalization theory, which explains why firms expand abroad through foreign direct investment rather than exporting or licensing. It explores how internalization can help firms reduce transaction costs and better exploit firm-specific advantages in knowledge and technology. Wholly owned subsidiaries allow firms to internalize markets and control valuable information, though cultural and institutional differences across countries can increase costs. Licensing also has drawbacks like high transaction costs and potential loss of competitive advantages. Overall, internalization theory holds that firms will internalize activities abroad when the benefits of controlling resources and capabilities outweigh the costs of international expansion.