This is not the first time the Islamic Republic has taken foreigners hostage. It’s proven an effective bargaining chip for decades and this time around, it has earned the state billions of dollars in unfrozen assets. Also, should you go for a forever-fixed mortgage if you can (09:36)? And what an American chain restaurant says about the importance of cross-class mixing (15:15).Sign up for Economist Podcasts+ now and get 50% off your subscription with our limited time offer. You will not be charged until Economist Podcasts+ launches.Visit http://www.economist.com/podcastsplus-intelligence to join.If you’re already a subscriber to The Economist, you’ll have full access to all our shows as part of your subscription.For more information about Economist Podcasts+, including how to get access, please visit our FAQs page. Hosted on Acast. See acast.com/privacy for more information.