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Most prior studies have found that substituting biofuels for gasoline will reduce greenhouse gases because biofuels sequester carbon through the growth of the feedstock. These analyses have failed to count the carbon emissions that occur as farmers worldwide respond to higher prices and convert forest and grassland to new cropland to replace the grain (or(More)
This paper develops a simple model of land use with roots in von Thunen's work. A cross-section version of the model is estimated with data from a satellite image and other geographical sources for a region in central Mexico. Parameters from the model are used to examine the effects of reduced human activity. If variables that proxy human influence are(More)
Use of crop biotechnology products, such as genetically engineered (GE) crops with input traits for pest management, has risen dramatically since commercial approval in the mid-1990s. This report addresses several of the economic dimensions regarding farmer adoption of bioengineered crops, including herbicide-tolerant and insect-resistant varieties. In(More)
The authors analyze and compare two data sets on land-use change in U.S. counties with rapidly growing populations for the period from 1960 to the early 1980s. The results show that "the net effect of changing household numbers, household characteristics, and economic constraints on demand for land is likely to mean less conversion of land for urban uses(More)
1420 27 MARCH 2015 • VOL 347 ISSUE 6229 sciencemag.org SCIENCE D ebates about biofuels tend to focus separately on estimates of adverse effects on food security, poverty, and greenhouse gas (GHG) emissions driven by land-use change (LUC) ( 1– 4). These estimates often rely on global agriculture and land-use models. Because models differ substantially in(More)
Economic analysis can be a guide to determining the level of actions taken to reduce nitrogen (N) losses and reduce environmental risk in a cost-effective manner while also allowing consideration of relative costs of controls to various groups. The biophysical science of N control, especially from nonpoint sources such as agriculture, is not certain.(More)
Agricultural pollution of the environment is jointly determined by economic decisions driving land use, production practices, and stochastic biophysical processes associated with agricultural production, land and climate characteristics. It follows that environmental and economic statistics, traditionally collected independently of each other, offer little(More)
This paper demonstrates how satellite images and other geographic data can be used to estimate the determinants of land use. A cross-section model is estimated with data from central Mexico. Parameters from the model are used to examine the effects of reduced human activity. If variables that proxy human influence are changed to reflect reduced impact,(More)
Paul R. Adamus Peter H. Albers Jose A. Amador David H. Anderson Jane E. Austin Bruce A. Babcock Kemuel S. Badger Guy A. Baldassarre Karyn Bartlett Carol C. Baskin Jeffrey V. Baumgartner Barbara L. Bedford Scott D. Bridgham Mark M. Brinson A. Lawrence Bryan, Jr. Charlotte S. Bryant Robert N. Buchsbaum Marilyn A. Bulbrd Douglas A. Bulthuis David M. Burdick(More)