Donna J. Lee

Modeling Regional Agricultural Production and Salinity Control Alternatives for Water Quality Policy Analysis

Water development and allocation to competing uses without well-defined water quality rights contribute to water use externalities. Federal legislation to address the salinity externalities in the Colorado River Basin comprises a set of arbitrary quality standards and millions of dollars in federal projects. This study specifies economic criteria to empirically determine first- and second-best quality standards and to indicate opportunities for efficiency gains in existing policy. A basin-wide, nonlinear programming model optimizes river water quality, resource allocation, production levels, and total expenditures for control. Revealed are the economic tradeoffs between water uses, regions, and control strategies. Copyright 1996, Oxford University Press.

Economic Impacts of the U.S. Soybean Aphid Infestation: A Multi-Regional Competitive Dynamic Analysis

We estimated the economic benefits resulting from controlling soybean aphid infestation by using a multi-regional competitive dynamic equilibrium model. Results indicate that the reduction of soybean production resulting from a soybean aphid infestation is largely absorbed by reducing soybean exports, due to the higher price elasticity of export demand compared to domestic demand. Producer benefits resulting from controlling soybean aphids would increase by between

Estimating the Value of Invasive Aquatic Plant Control: A Bioeconomic Analysis of 13 Public Lakes in Florida

949 million and

Integrated Models of River Basin Planning, Development, and Management

1.623 billion in ten years under various scenarios. Results also suggest that it is economically more efficient to control soybean aphids when the rate of intrinsic growth is relatively lower, the supply price elasticity of soybean acreage is relatively more elastic, and insecticide treatment costs per acre are lower. However, if the discovery of the gene Rag-1 (TF04048) leads to new cultivars that withstand the soybean aphid, our estimates will overestimate the actual damages. Even so, our analysis demonstrates that it is critical to control soybean aphids early in their infestation cycle to avoid a rapid increase in damages.

Optimal Management of a Potential Invader: The Case of Zebra Mussels in Florida

We present a bioeconomic model of three invasive aquatic plants (hydrilla, water hyacinth, and water lettuce) in 13 large Florida lakes, and simulate one-year and steady-state impacts of three control scenarios. We estimate that the steady-state annual net benefit of invasive plant control is

Multiregional Invasive Species Management: Theory and an Application to Florida's Exotic Plants

59.95 million. A one-year increase in control yields steady-state gains of

A Bioeconomic Analysis of Management Alternatives for the U.S. North Atlantic Swordfish Fishery

6.55 million per year, and a one-year lapse causes steady-state annual losses of

The effect of wildlife recreational activity on Florida's economy.

18.71 million. This model shows that increased control of hydrilla, water hyacinth, and water lettuce is optimal.

Volume and value of marine ornamentals collected in Florida, 1990-98

ABSTRACT River basins are inherently complex systems comprising many interdependent components. Development activities undertaken without full consideration of the regional, social, environmental, and economic implications can and have had adverse repercussions. Management practices that respond to a single water use, a single population segment, or a single sector have caused inadvertent disruption to other uses, populations, and sectors. This review promotes a systems approach for developing and managing river basins. By including all critical components into a river basin plan, development and management objectives will be better met. To this end, we review integrated economic river basin models covering a wide range of issues, including water quantity and quality, environmental considerations, and conflicts at the sectoral, regional, and international levels. This synopsis characterizes the essential components of economic river basin modeling, provides guidelines for model specifications, and illustr...

Economics of aquaculture and invasive aquatic species - an overview.

Dominant users of Lake Okeechobee water resources are agricultural producers and recreational anglers. These uses will be directly affected, should the lake become infested with zebra mussels. We employ a probabilistic bioeconomic simulation model to estimate the potential impact of zebra mussels on consumptive water uses, recreational angling, and wetland ecosystem services under alternative public management scenarios. Without public management, the expected net economic impact from zebra mussels is -