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Las obras del premio Nobel de Economía Paul Krugman, se han convertido en una referencia indispensable en el estudio de la materia, y están siendo utilizadas como libros de texto para cursos introductorios de Economía en universidades de todo el mundo. La nueva edición de Macroeconomía de Paul Krugman y Robin Wells, ha sido revisada y reformada con la intención de ampliar su atractivo para los estudiantes de empresa, ser tan actual e innovadora como sea posible en los temas abordados y en los ejemplos incluidos, y hacer su lectura mucho más accesible.

When Postmaster General Creswell penned his concern about the impact 2 of electronic diversion on his postal organization, the year was 1872. General Creswell, it turned out, fretted unnecessarily. Facsimile did not achieve commercial viability until roughly a century after his tenure as Postmaster General and today that technology is fading rapidly from the communication scene. Moreover, it never appears to have significantly affected physical letter volumes. However, if General Creswell were leading a major postal organization today, he likely would feel threatened by the potential of Internet communication to cause electronic diversion of physical mail. Should recent technology developments cause the oft-predicted (but so far incorrect) inflection point that would mark the beginning of declining mail volumes. the implications from a management standpoint will be profound. The relatively fixed nature of postal costs suggest that volume declines must be offset though improved productivity, reduced cost of inputs, revenue from new products that share common costs, or reduced level of universal service.

Emerging Competition in Postal and Delivery Services brings together practitioners, postal administrators, the courier industry, regulators, academic economists and lawyers to examine important policy and regulatory issues facing the postal and delivery industries. This volume reviews such topics as cost and productivity analysis, universal service and entry, demand analysis and the structure of postal payment system, price regulation and competition.

Managing Change in the Postal and Delivery Industries brings together practitioners, postal administrators, the express industry, regulators, economists and lawyers to examine the important policy and regulatory issues facing the postal and delivery industries. This volume reviews such topics as international postal policy, the universal service obligation, regulation and competition, entry and the role of scale and scope economics, cost analysis in postal services, and service standards. This book provides a unique perspective on the problems facing postal and delivery networks.

Current Directions in Postal Reform brings together leading practitioners, worldwide postal administrations, and the courier industry as well as a number of regulators, academic economists, mailers and lawyers, to examine some of the major policy and regulatory issues facing the postal and delivery industry. Issues addressed include international postal policy; the universal service obligation; regulation; competition, entry, and the role of scale and scope economies; the nature and role of cost analysis in the postal service; productivity; interaction of law and economics; and service standards.

Competitive Transformation of the Postal and Delivery Sector is an indispensable source of information and analysis on the current state of the postal and delivery sector. It offers current insights of leading researchers and practitioners into strategy and regulation as well as the economics of this sector. Issues addressed include national and international perspectives, financial viability, the universal service obligation, regulation, competition, entry, the role of scale and scope economies, the nature and role of cost and demand analysis in postal service, productivity, interaction of law and economics, human resources, transition and reform issues. The papers in the book were selected from the papers presented at the 11th Conference on Postal and Delivery Economics, Toledo, Spain, June 4-7, 2003.

1. THE PROBLEM OF CATASTROPHE RISK The risk of large losses from natural disasters in the U.S. has significantly increased in recent years, straining private insurance markets and creating troublesome problems for disaster-prone areas. The threat of mega-catastrophes resulting from intense hurricanes or earthquakes striking major population centers has dramatically altered the insurance environment. Estimates of probable maximum losses (PMLs) to insurers from a mega­ catastrophe striking the U.S. range up to $100 billion depending on the location and intensity of the event (Applied Insurance Research, 2001).1 A severe disaster could have a significant financial impact on the industry (Cummins, Doherty, and Lo, 2002; Insurance Services Office, 1996a). Estimates of industry gross losses from the terrorist attack on September 11, 2001 range from $30 billion to $50 billion, and the attack's effect on insurance markets underscores the need to understand the dynamics of the supply of and the demand for insurance against extreme events, including natural disasters. Increased catastrophe risk poses difficult challenges for insurers, reinsurers, property owners and public officials (Kleindorfer and Kunreuther, 1999). The fundamental dilemma concerns insurers'ability to handle low-probability, high-consequence (LPHC) events, which generates a host of interrelated issues with respect to how the risk of such events are 1 These probable maximum loss (PML) estimates are based on a SOD-year'return'period.

Future Directions in Postal Reform brings together leading practitioners, world-wide postal administrations, and the courier industry, as well as a number of regulators, academic economists, mailers, and lawyers, to examine some of the major policy and regulatory issues facing the postal and delivery industry. Issues addressed include international postal policy; the universal service obligation; regulation; competition, entry, and the role of scale and scope economies; the nature and role of cost analysis in postal service; productivity; interaction of law and economics; and future technologies and service standards.

Postal and Delivery Services: Delivering on Competition is an indispensable source of information and analysis on the current state of the postal and delivery sector. It offers current insight into strategy, regulation as well as the economics of this sector. Issues addressed include international postal policy, the universal service obligation, regulation, competition, entry, the role of scale and scope economies, the nature and role of cost and demand analysis in postal service, productivity, interaction of law and economics, human resources, transition and reform issues.

Postal service has received considerably less attention in the economics literature than traditional public utilities. Postal service is facing some very important challenges arising out of the increasingly high-tech nature of postal service, the entry of competition into the business, and new attitudes on the part of government to postal service. In the United Kingdom and Germany the increased interest in privatization and recognition of the benefits of competition are likely to have an impact on postal service. These challenges mean that postal managers must learn new ways of doing business, not just in successfully introducing new hardware and in new internal operating procedures, but also in the development of new pricing and costing methodologies and in the introduction of new management information systems. In order to deal with these new developments managers need a solid foundation in applied microeconomic theory as it relates to postal service. This book encompasses the theoretical foundation for postal policy, particularly with regard to pricing, service quality, and competitive issues.

xiii • We have almost the cheapest letter price in the OEeD. • We've quadrupled the retail outlets where you can buy stamps, but closed three quarters of our Post Offices. On time delivery is better than 97%. • The workforce has been reduced by 40%, with a 25% increase in volumes over the period. Real unit costs, measured by total real expenditure divided by total volumes, have been reduced by over 20%. What do these results and achievements mean for policy setters around the world? In particular, do these results for New Zealand Post prove that it is a commercial business, and what are the lessons for other postal businesses? Market Forces New Zealand Post presently has a limited letter monopoly, a 45 cent letter price against an 80 cent competitive floor price. The existence of this level of protection somehow negates the company's commercial achievements. The combination of high efficiency and low prices cannot persuade everyone that the results are not my view, are the only ones that can solely monopoly driven. Market forces, in answer my question: is New Zealand Post a commercial organization? We need the test offree and open competition to see whether we've got the business formula right. Before advancing this argument, which in essence is the case for deregulation, it may be useful to distinguish between market behavior and Post behavior.

The European Commission and its member states, along with many others, are wrestling with the problem of how to implement the scheduled liberalization of the postal sector while maintaining the universal service obligation. This book addresses some of these concerns. It is comprised of original essays chosen from among several dozen presented at the 13th Conference on Postal and Delivery Economics, which was held in Antwerp, Belgium, in June, 2005.

Worldwide, there is considerable interest in postal and delivery economics. Governments, particularly in the European Union, are examining closely the roles of the two systems and how best to regulate them. This volume brings together 20 essays originally presented at the 12th Conference on Postal and Delivery Economics held in Cork, Ireland in June 2004. Contributors include researchers, practitioners, and senior managers from throughout the world.