National telecommunications planning in Brazil

During the past 15 years Brazil has undergone a process of rapid modernization in its telecommunications. Starting from a chaotic situation, institutional foundations were established and an ambitious development programme carried out. A fundamental piece of this programme was a planning process that proved to be flexible and adequate to handle the social and economic disparities of the country. The policies that have emerged from the planning process were implemented and provided good economic results and satisfaction to customers.     

PPI Partnerships vs. PPI Divorces in LDCs

In the last 15 years, a variety of public private-partnerships in infrastructure have been adopted throughout the developing and transition world. Because many of these experiences are also turning sour, it seems important to separate facts from emotions. The paper argues that the wide differences in interpretations of the facts can be explained by differences in the assessment criteria used to assess the incremental effect of reforms. It is also driven by the sectors, the regions and the actors on which the analysis tends to focus.     

Applications of Fuzzy Regression in Actuarial Analysis

In this article, we propose several applications of fuzzy regression techniques for actuarial problems. Our main analysis is motivated, on the one hand, by the fact that several articles in the financial and actuarial literature suggest using fuzzy numbers to model interest rate uncertainty but do not explain how to quantify these rates with fuzzy numbers. Likewise, actuarial literature has recently focused some of its attention in analyzing the Term Structure of Interest Rates (TSIR) because this is a key instrument for pricing insurance contracts. With these two ideas in mind, we show that fuzzy regression is suitable for adjusting the TSIR and discuss how to apply a fuzzy TSIR when pricing life insurance contracts and property‐liability policies. Finally, we reflect on other actuarial applications of fuzzy regression and develop with this technique the London Chain Ladder Method for obtaining Incurred But Not Reported Reserves.     

Experiments Testing Multiobject Allocation Mechanisms

This paper reports the results of over 130 auctions conducted under controlled conditions to examine the robustness of several auction mechanisms to allocate multiple objects. The simultaneous discrete auction process used by the Federal Communications Commission to allocate Personal Communications licenses was contrasted with a sequential auction and a combinatorial auction over a variety of demand conditions. In test environments created to check only the minimum competency of the procedures, the simultaneous discrete auction process produces highly efficient allocations, approaching levels similar to those found with a continuous form of the auction, and it outperforms a sequential auction. However, in environments created to stress test the procedures, a combinatorial auction outperforms the simultaneous discrete auction.     

Pareto optimality in continuous-time OLG economies

The aim of this paper is the achievement of a complete characterization of the Pareto optimality of competitive equilibria for deterministic, pure exchange, continuous-time economies with a countable number of overlapping generations, where each consumer’s life-span consists in a bounded interval of time. For such an environment, we obtain separate sufficient and necessary conditions for Pareto optimality in the form of the Cass’ criterion, that is, in terms of the equilibrium prices. However, these conditions are not equivalent in general. Therefore, in order to get that equivalence we are compelled to impose certain restrictions, either on consumers’ lifetimes, assuming that all of them have the same longevity, or on the dynamic behaviour of relative intertemporal equilibrium prices. In both cases, we are able to derive a single condition that is sufficient and necessary for efficiency, thus achieving full characterizations.     

Multidimensionality and Renegotiation: Evidence from Transport-Sector Public-Private-Partnership Transactions in Latin America

Multidimensional auctions are a natural, practical solution when governments pursue more than one objective in their public-private-partnership transactions. However, multi-criteria auctions seem difficult to implement and vulnerable to corruption and opportunistic behavior of both parties involved. Using data from road and railway concessions in Latin America, the paper examines the probability of renegotiation in connection with the selected award criteria. It shows that auctioneers tend to adopt the multidimensional format when the need for social considerations, such as alleviation of unemployment, is high. But more renegotiations would likely happen when the multidimensional format is used. Good governance, particularly regulatory quality and anti-corruption policies, can mitigate the renegotiation problem.