This special issue focuses on environmental problems related to poverty and economic growth in South Asia and seeks to illustrate the types of economic analyses that can be undertaken to address these problems. The idea for this issue emerged at the inauguration of the South Asian Network of Development and Environmental Economics (SANDEE). The papers presented at SANDEE's inaugural conference demonstrated the need for a tighter connection between environmental and development economics. The study of environmental change in poor countries benefits a great deal from well-established theoretical and empirical investigations of externalities and valuation of non-market goods, the staple of environmental economics as taught in the West. However, it is also closely tied to questions about institutions and why they succeed or fail. The spatial nature of dependence of the poor on local resources also matters. Further, the study of environmental change and of institutions cannot be divorced from policies and economic reforms in poor countries. These are some of the topics discussed in this collection.

Modeling the factors determining ecological and economic value gives rise to conceptual and methodological problems. Economic valuation typically focuses on use value in the short run, whether within or outside the market. Ecologists, however, are more concerned with ecological values, which provide an underlying long-run notion of value interpreted in a more general sense. This paper investigates the nature of the link between these two aspects of value in the context of a wetland in Northern India, which is also designated as a Ramsar site and a national park. A dynamic simulation model in a ‘STELLA’ environment is set up to understand the linkages between underlying ecological relationships and economic value emerging from them. The simulations point towards a critical dependence of economic value (direct and indirect income derived from the park) on ecological health indices. A non-linearity is to be seen in the impact of an increase in ecological health indices on tourist traffic. This responsive or elasticity with respect to ecological health is more at higher values of the indices, indicating thereby that once efforts at conservation increase the attractiveness of the park above a certain level, the impact may be cumulative and returns in terms of income may rise more than proportionately.

When continuous monitoring of individual emissions is not feasible, policy makers need to investigate what other options are available and how best to provide appropriate incentives for pollution reduction. This paper offers an analysis of some such options with a view to identifying and suggesting appropriate policy measures for emission control from automobiles in Delhi.

This paper while attempting to estimate the social benefits of cleaning the Ganges river in India highlights some of the emerging environmental and development issues in the river cleaning programmes. Methods involving the market and non-market valuation of environmental goods are used to estimate the benefits. The benefits estimated include user and non-user benefits, health benefits to the poor households living along the river, and agricultural benefits to farmers among other benefits. However, the benefits from fisheries, one of the important components of benefits from the river cleaning, could not be quantified in this paper. With the benefits that could be quantified, the program of cleaning the Ganges has positive net present social benefits at a 10 per cent social rate of discount and an internal rate of return as high as 15 per cent. Furthermore the estimates of benefits of river cleaning obtained in this paper provide guidance for designing the policy instruments to raise revenue for sustaining the river cleaning processes in India. A number of different mechanisms are considered to raise the resources for sustaining the cleaning of Ganges. They are a polluter-pays principle, a user-pays principle (with government involvement), a user-pays principle (without government involvement), and funding from the general tax system.

Diarrhoeal diseases are endemic in Delhi. The causes of diarrhoeal illness involve both the household and the public sector as a provider of a public good, namely water supplies. Questions of both adequacy and quality of the water supply available to the household for drinking purposes are of crucial importance. The present study conducts an objective assessment of the health damages incurred by urban households by adopting a health production function approach. A model for valuing the damages from contaminated water supplies, based on the theory of utility-maximizing consumer behaviour is developed for estimating the probability of illness for a household. An estimate for the predicted probability of observing illness in a household is obtained. This probability measure is subsequently used along with data on illness to derive treatment costs and the wage-loss arising from the illness. Thus, a measure of the total costs of illness is obtained.

Cost-effective policies allow for minimizing the compliance costs associated with reaching a desired environmental quality target. In this paper a conceptual model has been developed to examine the compliance costs under an intra-plant emission trading system for a non-uniformly mixed assimilative pollutant. The model incorporates the number of emission sources, the concentration of pollutants emitted at each source, the marginal cost of abatement for each source, the transfer coefficient that relates emission at each source with the impact on ambient air quality, and the desired ambient air quality target. The model is applied to an integrated steel plant in India. Results of this study demonstrate that emission trading is more cost effective than the existing regulatory system. Further, intra-plant trades would result in significant savings to the steel plant while securing an improvement in ambient air quality in the studied geographical area.