Homogamy by education and migration status in Monterrey,Mexico: changes and continuities over time

This paper reviews changes in homogamy by migration status and educational level in Monterrey, Mexico, through the analysis of marriage patterns for two cohorts of men born in 1905–1934 and 1940–1969. Results show a significant increase in educational homogamy, as well as in homogamy by rural origins. The changes suggest that education has played an increasingly important role in the process of mate selection, although certain particularistic characteristics, such as being a rural immigrant, are still important in marriage formation. The paper concludes with a discussion of the implications of these findings for the relationship between homogamy and social stratification.

On the minimum expected quantity for the validity of the chi-squared test in 2 2 2 tables

A 2 2 2 contingency table can often be analysed in an exact fashion by using Fisher's exact test and in an approximate fashion by using the chi-squared test with Yates' continuity correction, and it is traditionally held that the approximation is valid when the minimum expected quantity E is E S 5. Unfortunately, little research has been carried out into this belief, other than that it is necessary to establish a bound E>E*, that the condition E S 5 may not be the most appropriate (Martín Andrés et al., 1992) and that E* is not a constant, but usually increasing with the growth of the sample size (Martín Andrés & Herranz Tejedor, 1997). In this paper, the authors conduct a theoretical experimental study from which they ascertain that E* value (which is very variable and frequently quite a lot greater than 5) is strongly related to the magnitude of the skewness of the underlying hypergeometric distribution, and that bounding the skewness is equivalent to bounding E (which is the best control procedure). The study enables estimating the expression for the above-mentioned E* (which in turn depends on the number of tails in the test, the alpha error used, the total sample size, and the minimum marginal imbalance) to be estimated. Also the authors show that E* increases generally with the sample size and with the marginal imbalance, although it does reach a maximum. Some general and very conservative validity conditions are E S 35.53 (one-tailed test) and E S 7.45 (two-tailed test) for alpha nominal errors in 1% h f h 10%. The traditional condition E S 5 is only valid when the samples are small and one of the marginals is very balanced; alternatively, the condition E S 5.5 is valid for small samples or a very balanced marginal. Finally, it is proved that the chi-squared test is always valid in tables where both marginals are balanced, and that the maximum skewness permitted is related to the maximum value of the bound E*, to its value for tables with at least one balanced marginal and to the minimum value that those marginals must have (in non-balanced tables) for the chi-squared test to be valid.     

Women and Poverty in Spain (1981--1991)

Social Indicators Research -     

Stages of the Demographic Transition from a Child's Perspective: Family Size,Cohort Size,and Children's Resources

This article provides a new characterization of stages of the demographic transition from the perspective of children competing for resources within families and cohorts. In Stage 1 falling mortality increases the size of both families and birth cohorts. In Stage 2 falling fertility overtakes falling mortality to reduce family size, but population momentum causes continued growth in cohort size. In Stage 3 falling fertility overtakes population momentum to produce declining cohort size. We apply our framework to census microdata for eight countries and to United Nations population projections for a larger set of countries. The results suggest that most countries spend two to three decades in Stage 2, with declining family size offset by increasing cohort size. From the perspective of children aged 9–11, many countries enter Stage 3 between 2000 and 2010. Other countries, especially in Africa, will continue to experience increasing cohort size for several more decades.     

Are persons with disabilities included in the Colombian peace process?

This article follows on from our previous one about the armed conflict in Colombia and its relationship with disability. We seek here to explore the ways in which people with disabilities are starting to be involved in the peace process with the Revolutionary Armed Forces of Colombia – People’s Army (FARC-EP), and the avenues there are for representative organizations of disabled people to have a louder voice in Colombia. Currently, while legal and human rights approaches are important, people with disabilities in Colombia do not generally have the resources to fight for their own rights. However, there could be opportunities in the negotiations currently with the National Liberation Army (ELN) to include a specific focus on the rights of people with disabilities.     

Pre-hurricane linkages between poverty,families, and migration among Puerto Rican-origin children living in Puerto Rico and the United States

Population and Environment - Puerto Rican children comprise a historically vulnerable group that has garnered little attention from academics and policy makers. Then, Hurricanes Irma and Maria...     

Radon as a Tracer of Lung Changes Induced by Smoking

After smoking, exposure to radon and its progeny is the second leading cause of lung cancer. The probability of inducing lung carcinomas by inhaled radon progeny depends on the deposited radiation dose, and is significantly affected by physiological and morphometric changes induced by smoking. Due to irritation of the airways, the inhalation of cigarette smoke leads to the hyperproduction of mucus. Two concurrent processes occur: on one hand, increased production of mucus protects the target cells against radiation damage; on the other hand, in the case of long-term smokers, a chronic lung obstruction develops, causing an increase in the radiation dose to the lungs. Depending on the duration and intensity of smoking, these processes contribute to the final radiation dose with different weights. The primary objective of this study was to investigate to what extent these smoke-induced changes can modify the resulting absorbed dose of inhaled radon progeny relative to healthy nonsmokers. Since the bronchial dose depends on the degree of lung tissue damage, we have used this dose as a tool for detecting the effects of smoking on the lung epithelium. In other words, the biological effect of radon served as a tracer of changes induced by smoking.     

Racial microaggressions: Bridging psychology and sociology and future research considerations

This article reviews racial microaggressions, specifically psychology and sociology's historical trajectory in informing existing literatures and disciplines, in its connections to meso and macro levels of systemic racism. In doing so, we contend that a sociological understanding of racial microaggressions presents opportunities to better understand the cumulative and deleterious effects of racial violence on racialized groups. Furthermore, we argue that beyond bridging the disciplines of psychology and sociology to allow for more interdisciplinary analyses of racial microaggressions will help to move conversations in ways that more meaningfully capture the monstrosity of white supremacy and its cumulative deleterious effects of daily racial terrorism at all levels of society.     

Educational potential of e-social work: social work training in Spain

ABSTRACT

Information and communication technologies (ICTs) have enhanced peer communication and contributed to social change and, as such, have become an essential tool in the initial training and professional development of future social work practitioners. In the new millennium, it is particularly important to provide the foundations for delivering appropriate interventions in the fields of social education, social services, healthcare and development cooperation. To face these new challenges, training programmes in the framework of the European Higher Education Area should facilitate the acquisition of skills and competencies through curricula based on ongoing assessment which promote creativity and educational innovation. Through a systematic and comprehensive review of the scientific literature, this article examines the educational potential of e-social work in Spain and the training needs of social workers from an interdisciplinary approach. A critical debate is presented throughout the paper to encourage reflection among professionals. The study highlights the importance of the acquisition of digital skills through the development of educational intervention programmes using the latest technological media and resources with a view to serving citizens in these new spaces of interaction.     

A spatial model of political competition and proportional representation

 A spatial model of party competition is studied in which: (i) Parties are supposed to have ideology. By this we mean that their goal is to maximize the welfare of their constituencies. (ii) The policy implemented after the election does not need to coincide with the one proposed by the winner. The policy implemented should be a compromise that considers the proposals made by the different parties. In the case of proportional representation this compromise is modeled as a convex combination of the proposed policies with weights proportional to the number of votes obtained by each party. We provide some existence theorems and compare the equilibrium in our model with the equilibrium that exists under some probabilistic models. It is also shown that proportional representation will create incentives for the parties to announce radical platforms. Received: 17 May 1994/Accepted: 5 March 1996