The objective of this paper is to develop a model of the U.S. fertilizer industry, containing equations representing the supply, demand, price, imports, and exports of fertilizer products (both aggregate and specific). The model will be empirically estimated, and parameter estimates used to...

In this paper we determine the extent to which information about the comparative importance of major sectors of a state's economy can improve the ability to forecast compound annual growth rates in personal income. We first calculate compound growth rates in disposable personal income per capita...

This paper develops an econometric model of petroleum discovery and extraction. Impacts of three selected price policies for petroleum are analyzed with the model. Higher oil prices do encourage additional domestic oil exploration and extraction.

Interest in sustainable agriculture probably had its roots in the concept of sustainable development. There exist no agricultural production technologies or farming systems that are environmentally benign. The question thus becomes "what is sustainable and what is not?" The two underlying themes...

The March, 2015 pdf version is recently-edited from a paper written in the late 1980s. A scanned copy of the paper as written in the late 1980s is also available for download. Students who wish to use their math skills to verify each equation and elasticity calculation may wish to download both...

A growing share of water pollution in the U.S. can be attributed to nonpoint sources (USEPA 2002). Some of this trend can be attributed to declining point source (PS) emissions as a result of regulation under the Clean Water Act (CWA). However, fertilizer-intensive practices used to improve...