Trade policy negotiations increasingly have spurred ex ante economic quantitative assessments relying on detailed databases and computable general equilibrium (CGE) models of the national and global economies. In spite of the benefits imposed by a proper model accounting of all sectors and global consistency, there is some criticism about the use of the CGE framework mainly because of the lack of validation and inability to properly capture policy impact dynamics. In this book, Ernesto Valenzuela succeeds in increasing our understanding of the CGE tool to evaluate trade reform by providing (a) a reality check of these models' predictions confronting them with real data, (b) by bridging the knowledge gap about the impacts of trade reform and commodity market volatility, and (c) by incorporating stockholding behavior to handle short-run phenomena. As a whole, this book should spark the interest of avid economists to provide more empirical information about the links between trade policy measures and the well being of the poorest of which that are more than one billion.