Economists INK: Winter 2014 A Brief Analysis of Policy and Litigation Download the IssueEconomists INK: Winter 2014 – The ArticlesTenth Circuit Applies Profit Sacrifice Test by Henry B. McFarland, Special ConsultantE-Commerce Tax Implications of the Marketplace Fairness Act by Laura A. Malowane, Vice President, and Stephen E. SiwekEconomic Modeling and the Modernization of the National Airspace System by James W. BonoEI News and Notes