What is the main idea of this passage? [br] [originaltext]A libertarian think t

A libertarian think tank, reckon that eliminating all travel visas to the United States would add between $90 billion and $123 billion in annual tourist spending. By one estimate, introducing visa restrictions can lower trade and foreign direct investment between a pair of countries by as much as 25% .

In the knowledge economy, skilled employees are the assets that drive organizational success. Thus companies must learn from them — why they stay, why they leave, and how the organization needs to change. A thoughtful exit interview — whether it be a face-to-face conversation, a questionnaire, a survey, or a combination — can catalyze leaders’ listening skills, reveal what does or doesn’t work inside the organization, highlight hidden challenges and opportunities, and generate essential competitive intelligence.