Can securities be settled on a blockchain and, if so, what are the gains relative to existing settlement systems? We consider a blockchain that ensures delivery-vs-payment by linking transfers of assets with payments and operates via a Proof-of-Work protocol. The main problem is to overcome...

The marginal cost of public funds is the equilibrium price at the intersection of the appropriately-defined demand curve for and the supply curve of public expenditure. In a world with identical people and with no excess burden of taxation, that price would have to be 1. Otherwise the median...

This paper examines the second-best tax policy to minimize envy in the sense of Chaudhuri (1986) and Diamantaras and Thomson (1990). An allocation is 'lambda'-equitable if no agent prefers a proportion 'lambda' of any other agent's bundle. We study the allocations that maximize 'lambda' among...

An ideal planner would follow the original Samuelson rule to undertake each and every public project, program or activity up to the point where the sum of its marginal benefits is just equal to its marginal cost. Actual governments modify the rule in response to the marginal cost of public funds...

This paper studies the optimal Pigouvian tax for correcting pollution when the government also uses distortionary taxes to raise revenues. When preferences are quasilinear in leisure and additive, the Pigovian tax can be separated from the Ramsey revenue-raising tax. We characterize the...

An optimal commodity tax approach is taken to compare trade taxes and VATs when some commodities are produced informally. Trade taxes apply to all imports and exports, including intermediate goods while the VAT applies only to sales by the formal sector and imports. The VAT can achieve...

A common, though by no means universally-accepted doctrine among practitioners of law and economics is that redistribution is no business of the law. This efficiency-only doctrine is not that redistribution is unworthy as a social objective, but that any given benefit to the poor is attainable...

We characterize an optimal redistributive pension scheme when individuals face temptation, but can exert costly self-control (as in Gul & Pesendorfer, 2001; 2004). Our results challenge the common wisdom that forced savings tend to reduce individuals' mental cost of self-control. In our model,...

Important as it is for public policy, there is still no consensus about the size of the revenue-maximizing tax rate at the top of the Laffer curve. The purpose of this essay is not to supply a correct rate, but to identify difficulties in doing so. 1) Estimates of the revenue-maximizing tax rate...

It is well-known that cash-flow business taxes with full loss-offset, and their present-value equivalents, are neutral with respect to firms' investment decisions when firms are riskneutral and there are no distortions. We study the effects of cash-flow business taxation when there is bankruptcy...