Multivariate models for correlated count data

In this study, we deal with the problem of overdispersion beyond extra zeros for a collection of counts that can be correlated. Poisson, negative binomial, zero-inflated Poisson and zero-inflated negative binomial distributions have been considered. First, we propose a multivariate count model in which all counts follow the same distribution and are correlated. Then we extend this model in a sense that correlated counts may follow different distributions. To accommodate correlation among counts, we have considered correlated random effects for each individual in the mean structure, thus inducing dependency among common observations to an individual. The method is applied to real data to investigate variation in food resources use in a species of marsupial in a locality of the Brazilian Cerrado biome.     

The vital package living on the streets in global cities: São Paulo,Los Angeles and Tokyo

The main objective of this article is to acknowledge and examine the material culture of the homeless in the urban context of downtown areas in Sao Paulo, Los Angeles and Tokyo. Firstly, I introduce some aspects of the complex process of vital package production, which concerns the social function of design and the role of products in our late industrial society. In exploring this process of homeless material culture, I then describe the reverse sense of some of the products and materials re‐functionalized by the homeless. Then, in a brief analysis of design, wasteful culture, products, life cycle and obsolescence, I claim that homelessness and design are linked to the public spaces of metropolitan areas and global cities, as a consequence of the social‐spatial exclusionary processes due to spatio‐economic conflicts that constitute contemporary urban restructuring.     

Diversity of vascular plants growing on walls of a Brazilian city

City walls are very specialized environments, conditioned by human activities. There is little information about plants that invade human-made habitats, and no study done in Brazil with plants growing up on walls. The aim of the present study was to survey the wall vascular flora of a Brazilian city, comparing the diversity found in its downtown and neighborhoods. Fieldwork was done in Jundiaí, São Paulo State, where data was collected in downtown and in five neighborhoods. In each place, three transects of 1 km were established and every plant individual was registered. Twenty-eight species were identified, all of them on the downtown transect and most also on the neighborhood transects. Five species were the most frequent, although none were dominant. The diversity indicies of the six transects were not significantly different, with an overall diversity of H′ = 2.93.     

The impact of AIDS on income and human capital

This paper studies the impact of HIV/AIDS on per capita income and education. It explores two channels on how HIV/AIDS affects income that have not been sufficiently stressed by previous literature: the reduction of the incentives to stay in school due to shorter expected longevity and the reduction in productivity of experienced workers. In the model, individuals live for three periods, may get infected in the second period, and with some probability die of AIDS before reaching the third period of their lives. Parents care for the welfare of the future generations so that they will maximize lifetime utility of their dynasty. The simulations predict that the most affected countries in Sub-Saharan Africa in the future will be, on average, 30% poorer than they would be without AIDS. Schooling will decline in some cases by 40%. These figures are dramatically reduced with widespread medical treatment, as it increases the survival probability and productivity of infected individuals.     

Native and exotic species in the urban landscape of the city of Rio de Janeiro,Brazil: density,richness, and arboreal deficit

Shaped by European influences, the Brazilian urban landscape was marked by the predominant use of exotic species in planted areas. In the 19th century along the city streets of Rio de Janeiro, trees were planted at a standard distance from each other. With time, native species began to be used in the urban landscape. Our purpose was to evaluate the utilization of exotic plant species in the urban landscape of Rio de Janeiro, evaluate the city’s arboreal deficit, and relate its neighborhood arboreal density to its economic index. Arboreal deficit represents the negative difference between the total number of expected trees and the observed number in the streets based in the standard distance used in the past. Twenty native and 40 exotic species were found in the 1701 streets sampled. A high percent of streets did not have any planted trees and the number of trees was greater in wealthier neighborhoods. The strong prevalence of exotic species is indicative of the negative impact of human activity on the biota. Since the municipality of Rio de Janeiro harbors forested areas, the risk for dissemination of exotic species is high.     

The impact of affectivity on the behaviour of Portuguese adolescents / El impacto de la afectividad en la conducta de los adolescentes portugueses

The theoretical literature about affectivity shows its influence over positive and negative behaviour. This study analyses the impact of affectivity on the behaviour of Portuguese adolescents, as this knowledge is considered relevant to promoting skills and decreasing risky behaviours in adolescents. A total of 696 students (M = 15.22 years old; SD = 1.4) participated in this study by responding to the PANAS-N (Positive and Negative Affect Schedule) and SDQ (Strengths and Difficulties Questionnaire). The former measures the level of affect while the latter measures prosocial behaviours, emotional symptoms and behavioural problems. The results showed that positive affect positively influences prosocial behaviour. Emotional symptoms and behaviour problems are negatively affected by positive affect, and positive symptoms and behaviours by negative affect. Moreover, boys had higher scores on behaviour problems, while girls had higher scores in prosocial behaviour and emotional symptoms. For these reasons, affectivity should be considered in programmes to reduce behaviour problems and emotional symptoms.     

Neo-development of underdevelopment: Brazil and the political economy of South American integration under the Workers’ Party

ABSTRACT

This article critically assesses Brazil’s role in the South American regional integration process. My hypothesis is that despite the rhetoric of Brazil’s Workers’ Party (PT) governments about a ‘new developmentalism’ project to support ‘post-neoliberal’ regional integration, the structural continuities imposed by neoliberal macroeconomic policies have constrained all possibilities of overcoming underdevelopment. In the realm of regional integration, the driving force has been the internationalization of oligopolic Brazilian business in a process that promised Brazil a leadership role in the subcontinent. This frame has fostered business based on the overexploitation of labour and the destruction of the environment, enforcing trends that deepen the structures of economic dependency and social conflict. The political outcome of that process is that the PT has contributed to contain social pressures, both in the domestic and in regional contexts, as Brazil has played a moderating role in South America’s so-called progressive wave.