I want to begin by thanking God and Our Lady, thanks a lot for your company, support and give effort in the difficult moments. I'd like to express my gratitude to my wife for her unwavering support and never-ending encouragement over all of my years of study as well as during the process of gathering information and writing this thesis. All of this would not be possible without you. I am grateful that my daughter, who arrived in the middle of this process and gave me a special motivation to fight for this dream. I'm grateful. Juli and Sofí, this is for you, my loves.I must convey my sincere gratitude to my family, specifically to my parents, my brother, my sister, and my wife's parents and sister. I'd like to express my gratitude to my thesis advisors, Ph.