1. The Uppsala internationalization model proposes that firms gradually increase their international involvement through incremental steps of no regular exporting, using independent representatives, establishing sales subsidiaries, and finally production subsidiaries in foreign markets. This allows firms to take a gradual approach and manage risk.
2. Transaction cost analysis theory suggests that firms should internalize activities through wholly owned subsidiaries when the transaction costs of using external organizations are too high.
3. Porter's diamond framework analyzes the national environment using factors of demand conditions, related and supporting industries, firm strategy/rivalry, and factor conditions that influence the competitiveness of industries within that nation.