Using individual travel diary data collected before and after a rail transit expansion in urban Beijing, the impact of urban rail accessibility improvement on the usage of rail transit, automobiles, buses, walking and bicycling, as well as the cross-area externality induced by congestion alleviation, is estimated. The results show that rail transit usage significantly increased for commuters residing in the affected areas and that the additional rail passengers were previously auto users, rather than bus passengers. The cross-area externality is estimated as small, which implies that the congestion alleviation was not large enough (yet) to change the travel mode choices of commuters residing in areas that did not experience the improvement. Furthermore, the results show that neither the number of commute work trips nor their length increased, indicating that the quantity of travel was not increased by the rail transit expansion.

This paper evaluates the impact of climate change on agricultural productivity. Cross-sectional variation in climate among Brazilian municipalities is used to estimate an equation in which geographical attributes determine agricultural productivity. The Intergovernmental Panel on Climate Change (IPCC) predictions based on atmosphere–ocean, coupled with general circulation models (for 2030–2049), are used to simulate the impacts of climate change. Our estimates suggest that global warming under the current technological standards is expected to decrease the agricultural output per hectare in Brazil by 18 per cent, with the effects on municipalities ranging from−40 to+15 per cent.

We consider firms facing the risk of natural disasters and study their problem of investing in mitigation if financial insurance is not available. The firms' problem is to choose the optimal timing and size of the investment. The timing problem leads to a critical productivity size where firms above it invest in mitigation while firms below the threshold decide to not invest. We investigate how cash aid such as emergency response, and in-kind aid such as reconstruction, rehabilitation or disaster risk reduction investments, affect the critical productivity threshold and the optimal investment size and characterize the international donor's optimal charity strategy.

Our study examines the effect of water utilization together with the effect of water quality on economic growth across countries. We constructed a panel of 177 countries covering the period of 1960–2009. We analyse two dependent variables, gross domestic product per capita and the average of five years of growth. The analysis is conducted using a fixed effects model and fixed effects with instrumental variables. We find that although water utilization affects growth, water quality also proves to be highly significant and affects growth in both the short and long run to a greater degree than water quantity.

The effect of preference uncertainty on estimated willingness to pay (WTP) is examined using identical payment cards and alternative uncertainty elicitation procedures in three split samples, focusing on air quality improvement in Nairobi. The effect of the stochastic payment card (SPC) and polychotomous payment card (PPC) are compared with a conventional payment card (PC). Substantial financial support is found for improved air quality in Nairobi, with approximately 85 per cent of the whole sample stating a positive WTP. The way WTP values are elicited, with and without ability to express preference uncertainty, has significant effect on WTP welfare estimate. Allowing respondents to express experienced uncertainty when stating WTP value yields more conservative but less accurate WTP values for inclusion in policy analysis. The PPC seems to hold more promise since it is easier to understand and imposes less cognitive burden on survey participants than the SPC in a developing country context.

The authors study the impact of natural resource degradation on income diversification in Beninese fishing communities. Using survey data and econometric analysis, they show that fishermen are more likely to diversify their income when the degradation of the fish stock is more severe. However, the level of income diversification that they find is surprisingly low and far from sufficient to relieve the stress on the lakes. The latter relates to low levels of formal education among fishermen and the unregulated use of highly productive, but damaging, fishing gear. These two factors result in a high return to fishing relative to non-fishing activities, even amid degradation.