This weekend American and Chinese officials are meeting to try and ease tensions over trade after China’s recent decision to restrict rare-earth exports. How has China gained the upper hand? Anxiety about screen time is focused on young people, but the elderly are addicted to devices too. And the wonder of waltzes, from Strauss to “Strictly Come Dancing”.Listen to what matters most, from global politics and business to science and technology—Subscribe to Economist Podcasts+For more information about how to access Economist Podcasts+, please visit our FAQs page or watch our video explaining how to link your account.

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