Estudios de Economía is published, since 1973, two times a year by the Department of Economics at the University of Chile. Its purpose is to publish empirical as well as theoretical papers in every field of Economics. All papers must go through refereeing process by two anonymous referees. As part of our editorial policy, an answer regarding the status of a paper will not exceed two months from its reception. If that were not the case, the authors are free to send their paper for consideration for publication elsewhere.