This dissertation studies the roles of comparative advantage, monopolistic competition, and firm-level heterogeneity in international trade.The first essay investigates cross-country and cross-industry variation in the fractions of exporters among domestic firms. The paper presents a model of an...

Replaced with revised version of paper 08/06/10.

This covers the market structure of Monopolistic Competition. It presents the characteristics of this market structure by contrasting them to those of Perfect Competition and Monopoly. It explains why these characterisics are important and explains that these have implications for the revenue...

Consumers voluntarily pay significant price premiums to acquire unobservable environmental attributes in green markets. This paper considers the performance of eco-certification policy under circumstances where consumers cannot discern environmental attributes in goods, but are able to form...

Estudiamos la política monetaria óptima desde una perspectiva atemporal en un modelo general de fijación de precios dependiente del estado (state-dependent pricing). Las empresas tienen poder monopolístico y están sujetas a perturbaciones idiosincráticas a sus costes de menú. Encontramos...

As networks improve and new services emerge, questions arise that affect service deployments and network choices. The Internet is arguably a successful example of a network shared by many services. However, combining heterogeneous services on the same network need not always be the right answer,...

This dissertation contains three essays that can be read independently. The first chapter examines how a debt crisis can occur and persist as a result of unanticipated, transitory, real interest rate and commodity price shocks. Using an optimal stopping framework, the debtor country's optimal...

This study is an empirical analysis of household expenditure behavior using the Linear and Quadratic Expenditure Systems. The expenditure systems are estimated using data collected in 1972 by the Departmento Administrativo Nacional de Estadisticas (DANE) of Bogota, Colombia. The Linear...

My dissertation research is composed of two parts: a theoretical part on semiparametric efficient estimation and an applied part in energy economics under different dynamic settings. The essays are related in terms of their applications as well as the way in which models are constructed and...