Brooks A. Kaiser

Valuing Indirect Ecosystem Services: the Case of Tropical Watersheds

Mitigating the harmful effects of development projects and industries (negative environmentalism) is inadequate, especially in resource-dependent economies whose resources are at risk from other forces. While positive environmentalism includes conservation projects, the non-market benefits of such projects are difficult to evaluate. This paper provides and illustrates a method for evaluating the indirect, watershed benefits of a tropical forest, without resorting to survey methods. The conservation of trees prevents a reapportionment from groundwater recharge to runoff that would otherwise occur. The value of the water saved is then valued at the shadow prices obtained from an optimizing model. An illustration of the model shows that watershed conservation projects may have very high payoffs, even before assessing existence values and other forest amenities.

Prevention, Eradication, and Containment of Invasive Species: Illustrations from Hawaii

Invasive species change ecosystems and the economic services such ecosystems provide. Optimal policy will minimize the expected damages and costs of prevention and control. We seek to explain policy outcomes as a function of biological and economic factors, using the case of Hawaii to illustrate. First, we consider an existing invader, Miconia calvescens, a plant with the potential to reduce biodiversity, soil cover, and water availability. We then examine an imminent threat, the potential arrival of the Brown treesnake (Boiga irregularis). The arrival of the snake in Guam has led to native bird extirpations, power outages, and health costs.

Economic impacts of non-indigenous species: Miconia and the Hawaiian economy

SummaryImperfect scientific information regarding potential invasiveness, differences between private and public outcomes for individual decisions regarding planting, and inadequate prevention activity combine to impose costs through a change in native ecosystems susceptible to invasion by hardy, rapidly reproducing non-indigenous species. Concepts and tools from economic theory that may improve policy decisions are explored through the specific example of Miconia calvescens in Hawaii. Rapid expansion of M. calvescens, an ornamental tree introduced to several Pacific Islands over the last century, threatens local watersheds, endangered species, and recreational and aesthetic values in the Hawaiian and Society Islands. Potential welfare losses from the unchecked spread of Miconia in Hawaii are illustrated. Policy options investigated include accommodation of these losses, efforts at containment, or eradication. Estimates are determined through an optimal control model describing the potential expansion of the weed and its control costs and damages. Results suggest that cost-effective policies will vary with the level of invasion as well as the expected net benefits from control efforts.

The Athenian Trierarchy: Mechanism Design for the Private Provision of Public Goods

The liturgical system in Classical Athens (479-322 BCE) privately provided public goods, including naval defense. I use it to evaluate mechanism design policies and to address uncertainties in the historical record by adding predictive economic theory to research by ancient historians. I evaluate the system’s success at meeting the conflicting goals of efficiency, feasibility, and budget balance by analyzing the Athenian citizens’ incentives within a game of asymmetric information. In the game, multiple equilibria occur; citizens may or may not volunteer for duty or avoid it. I relate the game theoretic findings to historical events.

Invasive Species Control over Space and Time: Miconia calvescens on Oahu, Hawaii

The optimal size and location of an invasive species population depend upon spatially differentiated biological growth, economic costs, and damages. Although largely absent from most economic models, spatial considerations matter because the likelihood and magnitude of the invasion vary spatially and the threatened assets may be unevenly distributed across space. We map the current and future populations of an invasive species, Miconia calvescens, on Oahu, Hawaii, and the potential damages to water quantity, quality, and endangered-species habitat, and weigh these against treatment costs. We find that optimal densities vary from approximately 1% to 18% cover throughout the island.

The future of the marine Arctic: environmental and resource economic development issues

Abstract We approach questions of Arctic marine resource economic development from the framework of environmental and resource economics. Shipping, fishing, oil and gas exploration and tourism are discussed as evolving industries for the Arctic. These industries are associated with a number of potential market failures which sustainable Arctic economic development must address. The varying scales of economic activity in the region range from subsistence hunting and fishing to actions by wealthy multinational firms. The ways in which interactions of such varied scales proceed will determine the economic futures of Arctic communities and the natural resources and ecosystems upon which they are based.

The Economic Value Of Watershed Conservation

Watershed conservation creates benefi ts within and beyond the management area of interest. The magnitude of the benefi ts also depends considerably on economic policies accompanying conservation measures. Direct benefi ts come from biodiversity protection, improved recharge, and the improved quality of ground and surface water. Additionally, the health of a watershed has profound implications on near-shore resources, including beaches and coral reefs. In the case of the Koolau Watershed on the island of Oahu, Hawaii, total economic benefi ts are found to be well above costs. The anticipated cost of watershed conservation into the indefi nite future has a present value of

Marine invasive species in the Arctic

43.2 million using a discount rate of 1%. The benefi ts of watershed conservation stemming from groundwater recharge alone vary widely depending on the assessment of increased recharge but may be more than

Watershed Conservation in the Long Run

900 million provided that conservation is accompanied by pricing reform. Benefi ts to near-shore resources (including the avoidance of beach closures and reef sedimentation) range from

A Century of Environmental Legislation

4.2 million to