China’s flip-flopping on video-game regulation reveals a messy message: leaders want to encourage “hard tech” such as chips and AI over the consumer kind—without sparking another costly crackdown. We ask Mark Carney, a former central-bank governor, whether he has ambitions to lead Canada (09:16). And why so many social-media types want to share their diaries online (18:19). Sign up for a free trial of Economist Podcasts+. 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 how to access Economist Podcasts+, please visit our FAQs page or watch our video explaining how to link your account. Hosted on Acast. See acast.com/privacy for more information.