Experience with an electricity market simulation tool

A successful experience to train power producers on pool-based electricity markets presented. Trainees are arranged in groups and assigned, at random, a set of generators. They play the role of power producers and compete against each other with the target of maximizing their own profits. They have to bid in terms of price and quantity to try to sell energy to the consumers through the market. The trainer plays the role of the market operator. A market simulator and a computer communication network make it possible to simulate the actual functioning of a pool-based electricity market. The simulator is based on the widely used software package MATLAB, and a computer communication net, which can be replaced by the WWW.     

From Nowhere: Space,Race, and Time in How Young Minority Men Understand Encounters with Gangs

Research on gangs within minority communities often focuses on gang crime and violence, and gang organization. Few studies examine the non-gang member side of the equation, especially in how potential victims make sense of gang encounters. This paper reveals how young Black and Latino men interpret gang encounters, interpretations that differ because of the following: one’s ethnicity, a gang’s ethnicity, the state of interethnic gang conflict, and a space’s ethnic makeup. It will also examine the intersection of time, specifically as to how shifting neighborhood demographics change the perceptions of these young minority men. This research is based on ethnographic fieldwork conducted in both Compton and South Central.     

Managing Migration,Managing Motherhood: The Moral Economy of Gendered Migration

For the past two decades, women have been migrating from Mexico to the United States on temporary work visas to pick meat from blue crabs in small coastal factories. Within a theoretical framework that argues for the relevance of a moral economic perspective to gendered migration, we examine the how participating in this migration influences migrants' families, including their abilities to produce higher‐quality lives. Specifically, we focus on the various factors that feed into the decision to migrate, the immediate consequences of those decisions for the relations among migrants, children, spouses and other family and community members, and the longer‐term consequences in terms of gender relations, the restructuring of parent–child relationships and the material benefits of work abroad. We find that women negotiate a variety of contradictions and paradoxes to participate in the programme, many of which directly influence their quest to reaffirm their abilities, as mothers, to produce quality human beings. These findings reflect more general global appeals for valuing human life by measures other than those of conventional political economy.     

Caregivers as Interventionists and Trainers: Teaching Mands to Children with Developmental Disabilities

The Analysis of Verbal Behavior - We evaluated the use of behavioral skills training (BST) to train caregivers to conduct procedures commonly associated with mand training. We trained two...     

Minimizing the maximum travel time in a combined model of facility location and network design

This paper presents a combined Facility Location/Network Design Problem which simultaneously considers the location of facilities and the design of its underlying network so as to minimize the maximum customer-facility travel time. The model generalizes the classical p-center problem and has various applications in regional planning, distribution, telecommunications, emergency systems, and other areas. Two mixed integer programming formulations are presented and compared. Several valid inequalities are derived for the most promising of these formulations to strengthen its LP relaxation bound and to reduce the enumeration tree. Numerical results of a series of computational experiments for instances with up to 100 nodes and 500 candidate links are reported.     

Improving the Measurement of the Relationship between Opportunities and Income: Evidence from Longitudinal Data from Chile

The relationship between exogenous circumstances faced in early childhood (opportunities) and earnings has been increasingly studied in the past decade. In this article we assess the sensitivity of this relationship to different income measures. Typically the empirical evidence is based on short‐term income measures that suffer from variability and measurement error. Using longitudinal data from Chile, we find that when four‐ and seven‐year earnings are used, the relationship between inequality of opportunity and income inequality is significantly higher than that obtained with yearly measures. Monte Carlo simulations with several data‐generating processes confirm this result. This supports policies targeted to reduce long‐term income inequality via providing equal opportunity to individuals at early stages in life.     

Hybrid Strategies: Allocating Involvement in the Digital Age

An important trait of mobile phones is their capacity to superimpose multiple social interactions in time and space. Little research examines how individuals choose between face‐to‐face and digitally mediated interactions in specific social contexts. Drawing upon focus group interviews with a diverse sample of university students in the United States, we argue that, contrary to a perspective that is popular in theory and journalistic commentary, mobile phone users do not experience the digital and the face‐to‐face as distinct realms. In deciding where to direct their attention, users enmesh the distant and the present, making moves that are expressive and strategic in their own right that reveal the interest, intimacy and urgency that users place in multiple, coinciding social involvements.     

Economic Growth and Poverty Reduction by Region: Chile 1990‐96

This article examines the evolution of poverty in Chile during 1990‐96, a period of rapid economic growth. It shows that Chile has embarked on a significant poverty‐reduction trajectory. The robustness of this result is examined by using nonparametric estimates of the income distribution and a stochastic dominance test. Growth is an important factor in explaining the poverty reduction that has occurred. Using the Datt‐Ravallion decomposition, it accounts for over 85% of poverty reduction at the national level. However, the pattern varies significantly across regions. Both growth, and its contribution to poverty reduction, vary significantly among regions. This seems to reflect the sectoral composition of growth across regions, with export‐oriented activities producing a larger poverty‐reduction impact.