ARTICLE SYNOPSIS ...Modeling with pattern recognition decision rules by Ted C. Earle Empirical decision rules can help you recognize patterns in price actions. Earle provides detailed buy and sell rules along with examples using data on gold price changes over time. Most of the interest in using mathematical models in finance and economics involves models based on hypothetical causal relationships described by quantitative mathematical functions. When these models work they may reflect substantial understanding of the system being simulated and provide a wealth of information about the internal relationships of...