A note on public debt, tax-exempt bonds, and Ponzi games

By issuing tax-exempt bonds, the government can incur debt and never pay back any principal or interest, even if the economy without public debt evolves on a dynamically efficient growth path. The welfare effects of such a Ponzi type borrowing scheme are mixed. The current young will unambiguously benefit. Depending on preferences and the aggregate technology, a finite number of subsequent generations may also benefit. However, the welfare of all generations thereafter will be lower than in the economy without public debt.