This thesis is composed by two articles. In the first paper, co-authored with Roberto Pancrazi, we study the relationship between sovereign debt and political frictions. We model political frictions as a disagreement among parties about distribution of resources. When analyzing a small-open economy framework we find two important results. First, when considering standard utility function (CRRA with risk aversion parameter greater or equal to one) political frictions induce saving (not borrowing) incentives. Second, when introducing retrospective voting, for which electoral outcomes are affected by recent economic performance, we find that more severe political frictions indeed lead to stronger borrowing incentives. Then, we use the th...