We know a lot about what kinds of policies are needed to support the development of productive sectors, but much less about why governments pursue these policies and why some governments achieve better outcomes than others. The paper reviews the many but disparate arguments on the comparative...

Cash are socially less costly than payment cards for all payments below DKK 29, while Dankort, the national Danish debit card, are cheaper for all other point-of-sale payments. These results are derived from calculations that divide costs of payments into fixed, variable-transaction-dependent,...