This book is the result of the work of a group of Law and Ecomics professors, mostly from the Universidad Nacional de Educación a Distancia (UNED), within the scheme of the Network of Educational Innovation as convened by the UNED in the academic year of 2015/2016. The particular Project that has been developed in the mentioned call and reflected in this book is named "Practical Application of theoretical knowledge in Law and Economics: A Bilingual and Interdisciplinary Approach". It has been conceived as a continuation of some previous work, also carried out by the authors of this book, in which basic aspects of the Spanish Legal and Economic systems were explained from a theoretical point of view. So once the theoretical analysis and explanation of both legal and economic issues was accomplished, we have completed the training path by providing a practical approach. In order to achieve this objective we have elaborated different kind of exercises through which to put in to practice the theoretical contents.