The purpose of this paper is to create and discuss a measure of water hyacinth abundance in Lake Victoria. Water hyacinths have dramatic effects on other activities such as fisheries. However…

We aim to study whether lax environmental regulations induce comparative advantages, causing the least-regulated countries to specialize in polluting industries. The study is based on Trefler and Zhu…

Diversity is often associated with resilience but in this model, unobserved genetic or behavioral diversity can explain the collapse of supposedly regulated fish stocks such as cod. Recent studies…

We tested a theoretical model with the Marshallian inefficiency (H1) and threat of eviction (H2) hypotheses having opposite effects on land productivity on sharecropped plots. The model also assumes…

Over the last two decades, China has sustained a rapid economic growth at about 8-10%, part of which is attributed to the positive total factor productivity (TFP) growth. However, this extraordinary…

The European Union has been relatively cautious about using biotechnology in food production. A label regime combined with the right of individual member states to ban introduction of new genetically…

This paper investigates and ranks a set of policy and technological interventions intended to reduce such health costs in the high population density areas of South Africa. The paper’s policy messages…

This is a guest speech when Prof Xu was attending the OECD Roundtable for Sustainable Development, January 8-9, 2007, Paris. His speech covers the following points: No 1: How does China fare in the…

Using an experimental approach, we investigate the risk preferences of artisanal fishermen in Tanzania waters of Lake Victoria. The experiment concerns pairwise comparisons of hypothetical fishing…

Using a contingent valuation survey, we elicit Swedish households' willingness to pay (WTP) to avoid power outages. In the study respondents are asked to state their WTP for avoiding nine different…