The social or economic discount rate is the threshold rate used to calculate the net present value of an investment project, a program, or a regulatory intervention to see whether the proposed expenditures are economically worthwhile to undertake. The size of the economic rate of discount has...

Improving end-use energy efficiency - that is, the energy-efficiency of individuals, households, and firms as they consume energy - is often cited as an important element in efforts to reduce greenhouse-gas (GHG) emissions. Arguments for improving energy efficiency usually rely on the idea that...

Discount rates are widely used in the public sector to assess policy proposals where costs and benefits accrue over long time periods. Socially optimal policy choices require an appropriate choice of discount rate. This paper assesses the applicability of the two key theoretical approaches to...

One of the core aims of transportation policies is to facilitate people's access to employment, health and education opportunities as well as cultural and leisure activities. Nonetheless, transport research and policies in Brazil are still largely focused on the challenges of reducing road...

Demand for air quality depends on health impacts and defensive investments that improve health, but little research assesses the empirical importance of defenses. We study an important cap-and-trade market, which dramatically reduced NOx emissions, a key ingredient in ozone formation. A rich...

In response to the perceived quality of a public good, households may choose to incur averting expenditures as a substitute to its aggregate provision, thereby revealing an (inverse) demand function. When unobserved heterogeneity affects both perceived quality and averting behavior,...

Through the canon of the UN SDGs or the European Green Deal, sustainability goals are finding their way into legislation. From an economic point of view, these targets often aim to reduce negative external effects, which is in many cases in line with the economic goal of maximising welfare. The...

Recent efforts to reinvigorate the connections between urban planning and health have usefully brought the field back to one of its original roles. Current research, however, has focused on industrialized cities, overlooking some of the important urbanization processes in poor countries. This...