This books covers three topics in mathematical economics and economics theory which are solved by the use of methods from mathematical statistics. It starts with a mechanism design that covers themes such as: Vickrey-Clarke-Groves Mechanism, Vickrey auction, Mechanism Design Illustrated in a Walrasian Example, Constructing Decentralized Mechanisms, from Parameter Indexed Product Structures: Transition to Message-Indexed Product Structures. Than it...