Guest host David Lazarus explores migration in the global economy, tech, and even underwater. Stanford law professor and immigration policy expert Dan Siciliano discusses H-1B visas in the tech industry, and Marketplace Tech’s Ben Johnson talks data migration. Bio-economist Rashid Sumaila speaks about the migratory patterns of whales and how they impact ecotourism, a multibillion-dollar industry. Plus, we hear stories and advice about moving for money.