This book is intended, first of all, as a guide for all those students of the faculties of administrative economic sciences who wish to carry out a research work to obtain a degree, oriented to the elaboration of a thesis in those sciences. Secondly, to serve as a text for the subject Research Methodology, taught in these faculties, being professors of the same the three authors who are also researchers in the areas, which has allowed enriching and giving a practical guideline to the present work. The structure of this book responds to the natural sequence of development in the development of research works, begins with the evolution of scientific thinking and research methods coming up to the present day, showing the emergence of social sciences, making a typology of different research projects according to different criteria. After this introduction, the principles to facilitate the selection of the research topic are presented, a situation that has been observed, which sometimes represents a serious obstacle for students who perform this type of work for the first time.