My thesis consists of three essays on International Economics. In the first two chapters, I study the role of domestic markets on the issuance of sovereign debt. In the third chapter, I evaluate the aggregate consequences of large devaluations on exporting dynamics. Chapter 2 studies the episodes of sovereign default triggering banking crises. First, those episodes are characterized by an important exposure of domestic banks to government bonds. Therefore, a default triggers a credit crunch in the economy. Second, output and investment show a considerable drop and a protracted recovery after the default. In this chapter, I focus on the channel in which a default affects the capital accumulation financed by banks. I build a quantitative mode...