This dissertation explores the role of search frictions in macroeconomics and highlights how these frictions influence micro-level decisions which in turn affect aggregated outcomes. Chapter 1 examines how individuals entering the job market during a recession can suffer persistent wage losses. I document how entering the job market during a recession not only affects wage outcomes but also severely impinges on early between-career changes. I then build a model that shows how entering the job market during a recession hampers early career mobility which is critical towards facilitating learning about one's comparative advantage and accumulating human capital specific to one's ideal career. Consequently, individuals who choose to switch ca...