The extent of genetic diversity in food crops is important as it affects the risk of attack by pathogens. A drop in diversity increases this risk. Farmers may not take this into account when making crop choices, leading to what from a social perspective is an inadequate level of diversity

This paper is about net national product (NNP). We are concerned with what NNP means, what it should include, what it offers us and, therefore, why we may be interested in it. We show that NNP, properly defined, can be used as a gauge for project evaluation, but we also show that it should not...

This paper is about net national product (NNP). We are concerned with what NNP means, what it should include, what it offers us and, therefore, why we may be interested in it. We show that NNP, properly defined, can be used as a gauge for project evaluation, but we also show that it should not...

Two and a half billion people are affected directly on a day-to-day basis by the allocation and use of purely local resources. Yet 'official' development economics has concentrated on headline international issues and only recently begun to take account of the dependence of poor countries on...

Two and a half billion people are affected directly on a day-to-day basis by the allocation and use of purely local resources. Yet 'official' development economics has concentrated on headline international issues and only recently begun to take account of the dependence of poor countries on...

Transnational commons, cross-border areas without well-defined property rights, have long been ignored in 'official' development economics. This volume redresses the balance by adopting an environmental approach which stresses the importance of shared natural resources and the links between...