The political power big tech firms wield, and the limited competition they face, have prompted warnings from politicians, regulators, economists, and others. Many have argued we should turn to antitrust laws as a way to address these concerns, but Nobel laureate Paul Romer says they may not be enough.

On this episode of the Capitalisn’t podcast, hosts Luigi Zingales and Bethany McLean speak with Romer about how the implementation of a digital advertising tax could address the size and business models of these tech firms.

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