Objectives: Theory development enables the modeling of relationships in physical functioning (PF), demonstrating the practical value of measurement theory relative to predictive control of the modeled parameters. Methods. Predictive theories provide highly practical foundations for efficient...

After 150 years of business, Lehman Brothers ran out of cash and credit, and filed for bankruptcy on September 15, 2008. As a publicly traded company, Lehman had filed all the reports required by U.S. securities law. But the hundreds of pages of words and numbers provided no timely warning of...