A tool for managing large numbers of APEX runs, handling data input and output. Program Components: • ACCESS Database: Contains input tables used by i_APEX to construct APEX runs and output tables to organize APEX output. • Graphical User Interface: Allows for single runs and ranges...

The proposed decision by the Environmental Protection Agency (EPA) to reduce biofuel mandates that can be met by ethanol to about 13 billion gallons is predicated in part on a finding that consumption of ethanol is largely limited to the amount that can be consumed in E10, a blended fuel...

In this paper, we discuss the importance of developing integrated assessment models to support the design and implementation of policies to address water quality problems associated with agricultural pollution. We describe a new modeling system, LUMINATE, which links land use decisions made at...

The Environmental Protection Agency (EPA) proposed in November to reduce 2014 biofuel mandates. One concern expressed by EPA is that it will be difficult, if not impossible, to consume the 2014 target levels of ethanol in the Renewable Fuel Standard (RFS) because of infrastructure issues....

The interactive APEX (i_APEX) is a user friendly interface for the physical process and environmental fate model, Agricultural Policy/Environmental eXtender (APEX) (Williams et al., 2006, 2008; Williams and Izaurralde, 2006; Gassman et al., 2010). I_APEX is programmed in C++ and performs automatic...

This paper develops a spatial equilibrium model suitable to analyze the economic impacts of measures (such as isolation distances and buffer zones) meant to ensure coexistence between GM and non-GM crops. We show that policies that put the cost of such measures exclusively on GM producers lead...

Economics models used by California, the Environmental Protection Agency, and the EU Commission all predict significant emissions from conversion of land from forest and pasture to cropland in response to increased biofuel production. The models attrib-ute all supply response not captured by...

Upon outbreak of a contagious animal disease, a primary motive for restoring disease-free status is often to regain access to international product markets. Efforts applied toward continuing or regaining such access is a public good-all growers benefit regardless of extent of private efforts...

China's livestock production sector is changing rapidly to meet a variety of challenges. At the same time, China's domestic consumers have begun to demand better quality and safer dietary protein sources; potential for international food market penetration has been compromised by food scandals;...

Maximum residue levels (MRLs) regulations in plant products can create unnecessary trade barriers on one hand and enhance demand via risk mitigation or quality assurance on the other. We stipulate a generalized gravity equation model to disentangle the effects of MRLs on the import demand and...