On this episode of Slate Money, Columbia’s School of International and Public Affairs economist Suresh Naidu joins host Felix Salmon of Fusion, Cathy O’Neil of mathbabe.org, and Slate’s Moneybox columnist Jordan Weissmann to talk about the economics of migration. Topics discussed on today’s show include: The differences between migrants and refugees. H2 visas for unskilled workers – the new American slavery? How H1 visas for skilled workers also prevent economic growth.   Slate Money is sponsored by Credit Karma. Don’t pay for your credit score!  With Credit Karma, you can see your credit score, right now, absolutely free. Just text MONEY to 89800 to download the free Credit Karma app and get started. And by Goldman Sachs. Information about developments currently shaping markets, industries and the global economy, on the firm’s podcast, ‘Exchanges at Goldman Sachs,’ available on iTunes. And by Braintree. If you’re working on a mobile app and searching for a simple payments solution, check out Braintree. With one simple integration, you can offer your customers every way to pay. Period. To learn more, and for your first $50,000 in transactions fee-free, go to braintreepayments.com/slatemoney.

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