The threshold hypothesis: evidence from less developed Latin American countries, 1950 to 1980

Historical research among European countries finds large differences in the level of social, economic or demographic development among countries, or regions within countries at the time marital fertility rates began their decline from traditional high levels. This research tests a threshold hypothesis which holds that fertility will decline from traditional high levels if threshold levels of life expectancy and literacy are surpassed. Using a pooled regression analysis of 1950, 1960, 1970 and 1980 crude births rates (CBRs) in 20 less developed Latin American countries, in conjunction with 10-year lagged measures of social, economic and family planning program development, analyses reveal statistically significant effects of passing Beaver's (1975) threshold levels of 1950 literacy, or 1950 life expectancy, that are independent of levels of lagged literacy (or lagged life expectancy), economic and family planning program development, as well as measures that control period effects.     

Forest soils adjacent to urban interstates: Soil physical and chemical properties,heavy metals,disturbance legacies,and relationships with woody vegetation

While urban ecology is an expanding field of study, some natural areas within the urban environment remain under-examined. These include naturally regenerating forest communities adjacent to urban interstates. In addition, the status of interstate soils and their relationships with the community composition of forested interstate verges has received little ecological study. The purpose of this study was to examine variation in soil conditions along forested interstate corridors in Louisville, KY and to explore the extent to which soil characteristics (e.g., bulk density, pH) and heavy metals (e.g., Pb, Zn) vary with respect to three factors: interstate (e.g., traffic density), surrounding urban environment (e.g., industrial land use), and interstate construction legacies. Additionally, we explored the relationships between several edaphic factors and woody vegetation structure in these forested verges. We found that the degree and direction of the slope of land towards the interstate and the distance to the interstate pavement were strong determinants of soil characteristics and heavy metal concentrations, suggesting that the movement of de-icing salts, heavy metals, and other pollutants from the interstate was important in determining forest soil conditions along urban interstates. Since within our study area these highways did not extend into rural lands, variation in urban land uses and cover within 26 km of the city center was not large enough to explain variation in soil characteristics or heavy metals, except for a positive correlation between chromium and surrounding industrial land use. We did find that past physical soil disturbance caused by interstate construction (e.g., imported fill) left an important legacy on soil characteristics, heavy metal retention, and woody plant growth patterns in forests adjacent to urban interstates. The legacy of interstate construction on the current forest community structure (e.g., lower species richness) and the future forest (e.g., reduced tree regeneration) may further alter ecosystem productivity and ecosystem services provided by these forests and their soils.     

Positive Illusions and the Necessity of a Bright Line Forbidding Psychologist Involvement in Detainee Interrogations

The authors commend Costanzo, Gerrity, and Lykes (2007) and their cogent summary of a number of ethical and scientific considerations relevant to evaluating the proper role of psychologists in national security interrogations of so-called "enemy combatants." From their careful analysis they derive a series of recommendations for the American Psychological Association (APA) and other psychology-related associations, all of which are quite powerful. While supporting these recommendations, the authors also argue that the logic and evidence presented by Costanzo et al. imply, in current legal, political, and organizational circumstances, that psychologists should play no role in the interrogations process. The authors propose that a "bright line" should separate the profession of psychology completely from national security interrogations. The argument is based partly upon ethical considerations, on the practical knowledge available for documenting psychologist participation in interrogations as members of the so-called Behavioral Science Consultation Teams (BSCTs) at Guantánamo, evidence from other locations and sources, and equally upon the social psychological research regarding the interrogation process so adroitly summarized by Costanzo et al.     

The contribution of supervisor behaviour to employee psychological well-being

Many employees affirm that supervisors affect employee well-being, and research has demonstrated associations between supervisor behaviour and employee psychological well-being. However, what hasn't been clear is the extent to which the association with supervisor behaviour compares with that of other variables known to affect well-being. This exploratory study addresses that issue. Our hypothesis was that supervisor behaviour can contribute to the prediction of psychiatric disturbance beyond the contribution of other influential variables. We created a new, questionnaire-based instrument to measure supervisor behaviour. We tested our hypothesis using stepwise regression with a convenience sample of 167 men and women working in a variety of organizations, occupations, and industries in the USA. Results supported our hypothesis: supervisor behaviour made a statistically significant contribution to the prediction of psychiatric disturbance beyond a step-one variate comprised of age, health practices, support from other people at work, support from home, stressful life events, and stressful work events. This provides additional evidence that supervisor behaviour can affect employee well-being and suggests that those seeking to create healthier workplaces should not neglect supervision. We believe that there is now ample justification for those concerned with psychosocial working conditions to consider supervisor behaviour as a potentially influential variable.

Furthermore, we believe that we have presented a new instrument for assessing supervisor behaviour that has the potential to be of value in future studies.     

Spatial variations in U.S. unemployment

Interstate unemployment rate differentials are large, tend to persist, and have not converged in recent times. The interstate differential in the natural rate of unemployment seems partially explained by several factors related to labor costs, including wage rates and such institutional factors as unionization, welfare, and probably tax policy. Differential welfare incidence may explain the black-white unemployment differential. Variations in intertemporal fluctuations in unemployment across states seem related to institutionalized wage rigidity caused by such factors as unions and welfare. For still unexplained reasons, unemployment tends to be higher in the West, deep South, and the industrial Midwest.     

The Panic to Leave: Economic Crisis and the "New Emigration" from Ecuador

Prior to the late 1990s, Ecuadorian international migration was directed primarily toward the United States. Of the estimated 400,000 Ecuadorians living in the United States, most are concentrated in metropolitan New York and many hail from the south–central highlands of Cañar and Azuay Provinces. In the mid– to late–1990s, Ecuador entered a political and economic crisis just as clandestine transportation to the United States became increasingly expensive and dangerous. Within two years Ecuadorian migration diversified radically and a "new emigration" formed. Many thousands of Ecuadorians from throughout the country migrated to Europe, mostly Spain, but also to France, Italy, and The Netherlands. Prior to 1998, few Ecuadorians lived in Europe, but now, Ecuadorians are the largest immigrant group in Madrid and one of the largest in Spain. The migrant stream was led by women and composed of people from a variety of ethnic and socioeconomic backgrounds. Ecuadorians find themselves working in a variety of services (especially women) and negotiating a volatile, even hostile, social, and political environment.
This "new emigration" has numerous implications for Ecuadorian families, the economy, and the nation–state. Understanding the implications requires a comparative approach that examines at least three aspects of the new emigration: the role of gender, the importance of transnational ties and connections, and the emerging roles of state and non–state actors in the formalization of migration.     

The economic effects of labor unions revisited

Using a variety of statistical techniques, we conclude that labor unions have reduced U.S. output by significant amounts —trillions of dollars over time. Additionally, the employment- population ratio and the unemployment rate have been adversely affected by the presence of unions. From the very beginning, unionization materially lowered employment in the auto and steel industries, and union militancy in coal mining has contributed importantly to largely eliminating employment in this once large industry. While some individual workers have profited from unions, the aggregate economic impact is strongly negative.     

American unemployment in historical perspective

During the twentieth century, the annual average unemployment rate reported by the Bureau of Labor Statistics data has varied between 1.2 and 24.9 percent. This article, derived from our recent book,Out of Work: Unemployment and Government in 20th Century America, examines and explains variations in unemployment over time. These large fluctuations in unemployment probably account for this century’s obsession with joblessness. Alfred Marshall’sPrinciples of Economics, published in 1890, barely mentions unemployment. Only two short generations later, unemployment was the dominant topic of interest among economists, and the most influential economics book of this century, Keynes’sGeneral Theory of Employment, Interest and Money, was concerned largely with explaining its existence.