Quality of life and sustainability issues as seen by the population of low-income housing in the region of Campinas, Brazil

This paper presents a study on quality of life and sustainability indicators relating to site-planning parameters for low-income public housing projects in the region of Campinas, Brazil. The study is based on a post-occupancy-evaluation (POE), conducted in five housing developments. Most of these housing projects are based on a repetitive model and are devoid of urban infrastructure. Users act on their own in providing for some elements considered necessary to create an identity and community spirit. Results show that the population relates quality of life to economic factors and sustainability is associated to reduce utility bills. Houses are preferred to apartments and satisfaction with the present housing conditions is high, despite low feelings of security in the neighbourhood. This work is part of a broader study, which aims to develop design evaluation tools. Most sensitive quality of life and sustainability indicators related to site-planning should permeate these tools and establish design guidelines. The inclusion of a large number of qualitative design issues into the decision-making process and the questioning of existing standardized solutions are seen as essential means to increase local housing quality.     

New Reduced-bias Estimators of a Positive Extreme Value Index

Noting that the classical Hill estimator of a positive extreme value index (EVI) is the logarithm of the mean of order-0 of a set of certain statistics, a more general class of EVI-estimators based on the mean of order-p (MOP), p ? 0, of such statistics was recently introduced. The asymptotic behavior of the class of MOP EVI-estimators is reviewed, and compared to their reduced-bias MOP (RBMOP) and optimal RBMOP versions, which are suggested here and studied both asymptotically and for finite samples, through a large-scale simulation study. Applications to simulated datasets are also put forward.     

An effective algorithm for obtaining the whole set of minimal cost pairs of disjoint paths with dual arc costs

In telecommunication networks design the problem of obtaining optimal (arc or node) disjoint paths, for increasing network reliability, is extremely important. The problem of calculating k _c disjoint paths from s to t (two distinct nodes), in a network with k _c different (arbitrary) costs on every arc such that the total cost of the paths is minimised, is NP-complete even for k _c =2. When k _c =2 these networks are usually designated as dual arc cost networks.     

Improved reduced-bias tail index and quantile estimators

In this paper, we deal with bias reduction techniques for heavy tails, trying to improve mainly upon the performance of classical high quantile estimators. High quantiles depend strongly on the tail index γ$\gamma$, for which new classes of reduced-bias estimators have recently been introduced, where the second-order parameters in the bias are estimated at a level _k1$k_1$ of a larger order than the level k at which the tail index is estimated. Doing this, it was seen that the asymptotic variance of the new estimators could be kept equal to the one of the popular Hill estimators. In a similar way, we now introduce new classes of tail index and associated high quantile estimators, with an asymptotic mean squared error smaller than that of the classical ones for all k in a large class of heavy-tailed models. We derive their asymptotic distributional properties and compare them with those of alternative estimators. Next to that, an illustration of the finite sample behavior of the estimators is also provided through a Monte Carlo simulation study and the application to a set of real data in the field of insurance.     

Multilateral Contracting with Externalities

This paper proposes a model for multilateral contracting, where contracts are written and renegotiated over time, and where contracts may impose externalities on other agents. Equilibria always exist and the equilibrium value function is linear and monotonically increasing on the contracts. If the grand coalition, or contracting among all agents, is inefficient, we show that bargaining delays arise in positive‐externality games and equilibrium inefficiency may remain bounded away from zero even as bargaining frictions converge to zero. Otherwise, if the grand coalition is efficient, there are no bargaining delays, convergence to the grand coalition occurs in a finite number of contracting rounds, and the outcome becomes efficient as players become more patient.     

Social Policy for Poverty Reduction in Lower-income Countries in Latin America: Lessons and Challenges

This article provides a comparative study of income transfer programmes recently introduced in lower-income countries in Central and South America, aimed at raising human development and consumption among groups in extreme poverty. The successful introduction of these programmes is challenging in these countries due to their high incidence of poverty, low delivery capacity and poor service infrastructure. The article discusses the design, implementation and impact of these programmes, as well as their institutionalization and dynamics. It concludes that these programmes can be effective in reducing persistent intergenerational poverty, but that their sustainability is undermined by weak institutionalization.     

Poverty Reduction: The Missing Piece of Pension Reform in Latin America

Employment‐based pension plans constitute the main form of pension provision in Latin America. Although recent pension reform in the region has focused on strengthening these, old‐age poverty remains high in most countries in the region, with older people over‐represented among the poor. The article argues that ensuring old‐age support for poor and vulnerable groups involves a different set of priorities and options for pension reform, namely a strong focus on tax‐financed public cash transfer programmes. Cash transfer programmes focused on poor older people are the missing piece of pension reform in the region. The article examines the experience of the handful of countries with such programmes in place, and draws the lessons for the future of social policy in the region.     

The Changing Face of Pensions in Latin America: Design and Prospects of Individual Capitalization Pension Plans

This paper discusses the spread of individual capitalization pension plans in Latin America in the 1990s. Following the example of Chile in 1980, Argentina, Colombia, Costa Rica, Mexico and Peru have all introduced individual capitalization pension schemes in the 1990s. The paper discusses the rationale for the reforms and compares the main design features of the reformed pension systems in these countries. Lastly, the likely success of pension reform is discussed by focusing on issues of pension scheme coverage, benefit adequacy and administrative costs.