In this dissertation, I study the changes in external liabilities and assets of emerging market economies since the early-2000s and the following implications of the changes for the financial stability and the optimal policies of the economies. In chapter 1, I construct a dataset, which measures...

Playing, Voting, and Dividing -- Playing Successfully: Noncooperative Game Theory -- Cooperative Game Theory -- Voting and Judging: Preference Aggregation by Voting -- The Complexity of Manipulative Actions in Single-Peaked Societies -- Multiwinner Voting -- Judgment Aggregation -- Fair...