This paper is a summary of some of the considerations involved in applying an existing model to a new problem, in particular in deciding whether to update or not, and some of the issues involved in interpreting the output from the new application. Thus where you start from does influence where...

Individual farm financial data are collected in about two dozen states by colleges of agriculture, farm record associations and state vocational-technical school programs. A wide variety of methods are used by the various systems to calculate measures of profitability, making it difficult to...