Income sharing for common pool resources with uncertain productivity

2026-07-16 16:30:39

Kelsall Claudia, Quaas Martin F, Quérou Nicolas
American Journal of Agricultural Economics
à paraître

We address the interconnected issues of externalities in the use of a natural common-pool resource system and adverse effects of environmental uncertainty on risk-averse resource users. We set up a simple, analytical model, and derive conditions such that insurance by means of an income sharing mechanism mitigates externalities, and hence achieves a socially optimal outcome. For this to materialize, we show that the sharing rule must be sufficiently sensitive to individual contributions, and specifically show that a simple, proportional sharing rule can provide incentives for both efficient contributions to the income pool and efficient use of the resource system.

Projecting future damage costs of non‐native species using combined dynamical and cost–density equations

2026-07-13 11:08:54

Ahmed Danish A, Bradshaw Corey J A, Tahat Noor, Hudgins Emma J, Courtois Pierre, Hulme Philip E, Watari Yuya, Tarkan Ali Serhan, Soto Ismael, Haubrock Phillip J, Balzani Paride, Cuthbert Ross N
Ecological Applications 36
2026

Biological invasions threaten biodiversity, economic stability, and public health, exacerbated by intensive global trade and transport. The economic costs of these invasions have exceeded US$2 trillion globally and continue to increase. Although past invasion costs have been described across various contexts, there are few robust projections of future costs, limiting effective management planning. We developed a mathematical framework to project future economic damage caused by biological invasions, combining cost-density relationships with a density-time function based on logistic population growth. We tested the model on five well-documented non-native mammal species in Japan, a country with long-term, high-resolution invasion cost records and a

Center for Environmental Economics - Montpellier - Monthly Publications feed

Income sharing for common pool resources with uncertain productivity

Projecting future damage costs of non‐native species using combined dynamical and cost–density equations