We study experimentally when, why, and how people intervene in others' choices. Choice Architects (CAs) construct opportunity sets containing bundles of time-indexed payments for Choosers. CAs frequently prevent impatient choices despite opportunities to provide advice, believing Choosers...

The death of welfare economics has been declared several times. One of the reasons cited for these plural obituaries is that Kenneth Arrow's impossibility theorem, as set out in his path-breaking Social Choice and Individual Values in 1951, has shown that the social welfare function - one of the...

We propose a formal re-definition of the concept market failure based on the idea of the imperfect state. In the Neo-classical taxonomy, a decentralized regime of exchange is a market failure if its laissez faire equilibrium solution is welfare-dominated by a technically feasible alternative. If...

The aim of this paper is to explain the process of diversification of normative economics by presenting the work of two authors: Tibor Scitovsky [1910-2002] and Amartya Sen [1933-]. While these two authors first contributed to traditional welfare analysis from within, they were subsequently...

The social cost of carbon (SCC) is a monetary measure of the harms from carbon emission. Specifically, it is the reduction in current consumption that produces a loss in social welfare equivalent to that caused by the emission of a ton of CO2. The standard approach is to calculate the SCC using...

Behavioral economics has shown that individuals sometimes make decisions that are not in their best interest. This insight has prompted calls for behaviorally-informed policy interventions popularized under the notion of "libertarian paternalism". This type of soft paternalism aims at helping...