The Gender Wage Gap and Poverty in Colombia

Abstract. Using 19 years of cross‐section wage data, we look at the trend of the ratio of male to female wages in Colombia. First, we observe a long‐term trend towards an increase in the gender wage gap that may be related to new labor regulations giving more protection to women and thereby raising the cost of female employment for firms. Second, we measure the impact on poverty of the increasing gap by producing estimates of the income distribution for the subsequent years had the wage gap remained at the low level it used to be in the early 1990s. As mainly low‐skilled women suffered from the increase in the wage gap, we find that the phenomenon contributed to an overall increase in poverty during the decade.     

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.     

Diaspora,Community and Communication: Internet Use in Transnational Haiti

Abstract With its capacity to link many people interactively across great distances, the Internet seems to be the ultimate tool for dispersed ethnic groups wishing to sustain identity in an ‘alien’ land and work in solidarity with those facing challenges at ‘home’. Some theorists speak of the creation of diasporic public spheres arising from creative use of Internet technologies. Nevertheless, scholars working in this area rarely embed their analyses within existing work on the public sphere. In the present study I use insights from public sphere theory to evaluate participants' use of a Haiti Global Village forum. After examining Haiti Global Village, I conclude that such forums offer needed space for civic deliberation and provide a valuable infrastructure for networking. Participants' difficulty in translating these assets into an off‐line project, however, highlights the importance of place‐based social ties. Consideration of the experience of other Haitian forums reinforces the importance of such ties.     

Minimum Φ-divergence estimator in logistic regression models

A general class of minimum distance estimators for logistic regression models based on the ϕ-divergence measures is introduced: The minimum ϕ-divergence estimator, which is seen to be a generalization of the maximum likelihood estimator. Its asymptotic properties are studied as well as its behaviour in small samples throught a simulation study. This work was supported partially by Grant DGI (BMF2003-00892).     

Modeling Technology as a Dynamic Error Components Process: The Case of the Inter-country Agricultural Production Function

In this paper, we propose a dynamic error-components model to represent the unobserved level of technology. This specification implies a well-defined common factor dynamic model for per capita output that can be tested explicitly. The model is applied to data on aggregates of agricultural inputs and outputs for groups of countries from the OECD, Africa (AF), Latin America (LA) as well as centrally planned countries, over a period of 31 years. We find that the proposed model fits the data better than alternative static specifications and satisfies the implied common factor restrictions in two of the samples. The results suggest that although technological change seems to have been a faster process for less developed countries relative to the OECD countries, it has not been fast enough to reduce appreciably the enormous differences in average technological levels that still persist between them.     

Evidence-based practices in the field of intellectual and developmental disabilities: an international consensus approach

As evidence-based practices become increasingly advocated for and used in the human services field it is important to integrate issues raised by three perspectives on evidence: empirical-analytical, phenomenological-existential, and post-structural. This article presents and discusses an evidence-based conceptual model and measurement framework that integrates these three perspectives and results in: multiple perspectives on evidence-based practices that involve the individual, the organization, and society; and multiple interpretation guidelines related to the quality, robustness, and relevance of the evidence. The article concludes with a discussion of five issues that need to be addressed in the future conceptualization, measurement and application of evidence-based practices. These five are the need to: expand the concepts of internal and external validity, approach evidence-based practices from a systems perspective, integrate the various perspectives regarding evidence-based practices, develop and evaluate evidence-based practices within the context of best practices, and develop a set of guidelines related to the translation of evidence into practice.