Tests of four hypotheses on soldier production, by using wild colonies ofPheidole fervida F. Smith (Hymenoptera: Formicidae)

Following four hypotheses on the production of soldiers were tested in thePheidole fervida colonies collected in the natural field:

Structural elements of material well-being: An empirical test among people on social security

The paper reports on a study of indicators of well-being, including objective indicators of well-being, global, affective indicators of well-being, and indicators of socio-economic well-being. Socioeconomic well-being is (narrowly) defined as that part of the individual's universal well-being which is strongly related to money and material means.It was hypothesized that these 3 classes of indicators of well-being have different meanings for the various groups of people on social security. Therefore, data were collected from a Dutch, nationally representative sample of 3 categories of individuals drawing benefits, namely: people receiving social benefits; unemployed, and disabled people, and a group of people in work. Hypotheses were tested regarding the following issues:

Pit-relocation of antlion larvae in relation to their density

Of the biotic factors potentially affecting the foraging behavior of pit-building antlion larvae,Myrmeleon bore Tjeder, we focussed on the density effects and examined experimentally influences of larval density on pit construction behavior, spatial distribution and pit relocation rate. Moreover the mechanism of mutual interference among larvae was examined.

Labour mobility and regional disparities: the role of female labour participation

Unemployment rates, as well as income per capita, differ vastly across the regions of Europe. Labour mobility can play a role in resolving regional disparities. This paper focuses on the questions of why labour mobility is low in the EU and how it is possible that it remains low. We explore whether changes in male and female labour participation act as an important alternative adjustment mechanism. We answer this question in the affirmative. We argue that female labour participation is very important in adjusting to regional disparities.

The changing nature of wage inequality

The paper reviews recent developments in the literature on wage inequality with a particular focus on why inequality growth has been particularly concentrated in the top end of the wage distribution over the last 15 years. Several possible institutional and demand-side explanations are discussed for the secular growth in wage inequality in the United States and other advanced industrialized countries.

Avowed Happiness in Confucian Asia: Ascertaining its Distribution,Patterns, and Sources

This study reviewed three philosophical accounts of happiness, and then tested those accounts with the Asiabarometer surveys conducted in six Confucian societies during the summer of 2006. Statistical analyses of these surveys reveal that East Asians tend to experience happiness to a greater extent when they experience enjoyment together with achievement and/or satisfaction. The preponderance of such multi-dimensional conceptions in all those societies poses a direct challenge to a single dimensional account of happiness in the West. The analyses also reveal that positive assessments of interpersonal relationships matter more than the amount of knowledge or wealth in living a happy life in Confucian societies.

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Enclaves, language, and the location choice of migrants

Empirical studies in the migration literature have shown that enclaves (networks) negatively affect the language proficiency of migrants. Most of these studies do not address the choice of location as a function of language skills. Using data on Mexican migration to the US, we show that migrants choose smaller networks as their English language proficiency improves.

Population aging and legal retirement age

This paper analyzes the effects of population aging on the preferred legal retirement age. What is revealed is the crucial role that the indirect ‘macro’ effects resulting from a change in the legal retirement age play in the optimal decision. Two social security systems are studied. Under a defined contribution scheme, aging lowers the preferred legal retirement age. However, under a defined pension scheme, the retirement age is delayed. This result shows the relevance of correctly choosing the parameter affected by the dependency ratio in the design of the social security programme.

How important is homeland education for refugees’ economic position in The Netherlands?

We use data on refugees admitted to The Netherlands that include registration of education in their homeland by immigration officers. Such data are seldom available. We investigate the quality and reliability of the registrations and then use them to assess effects on refugees’ economic position during the first 5 years after arrival. The most remarkable finding is the absence of returns to higher education.

The impact of the labour market on the timing of marriage and births in Spain

This paper investigates how education and the labour market affect Spanish individual decisions on the timing of marriage and births, using a Cox hazard approach. It disentangles men and women, and two groups, Cohort 1945–1960 and Cohort 1961–1977. Results show that female employment delays marriage in Cohort 1945–1960, but it has a reverse effect in Cohort 1961–1977. We also find evidence that employment is a barrier for family formation since employed women postpone births in both cohorts. The precarious Spanish labour markets, captured by female unemployment rates, delay family formation, especially by putting off marriage. Male unemployment, at the individual level, impacts negatively on fertility only through delaying marriage.

Labor market institutions and demographic employment patterns

We study collective bargaining’s effect on relative employment for youth, women, and older individuals. Our model of collective wage setting predicts that unionization reduces employment more for groups with relatively elastic labor supply: youth, older individuals, and women. We test this implication using data from 17 Organization for Economic Cooperation and Development (OECD) countries over the 1960–1996 period. We find that time-varying indicators of unionization decrease the employment–population ratio of young and older individuals relative to the prime-aged, and of prime-aged women relative to prime-aged men, and unionization raises the unemployment rate of prime-aged women and, possibly, young men compared to prime-aged men.

A discrete choice model for labor supply and childcare

A discrete choice model for labor supply and childcare for mothers of preschoolers is presented. The mothers are assumed to make choices from a finite set of job possibilities and from a finite set of childcare options. Options in the markets for childcare are characterized by opening hours, fees and quality attributes. Similarly, jobs are characterized by a fixed wage rate, working hours and a number of variables related to job satisfaction. In the estimation of the model, we take into account that the number of options available might vary across work/care combinations and that some mothers are rationed in the market for care at day care centers. The model is employed to simulate the female labor supply effects of the Norwegian home care allowance reform.

Does Mixed Methods Research Matter to Understanding Childhood Well-Being?

There has been a rich debate in development studies on combining research methods in recent years. We explore the particular challenges and opportunities surrounding mixed methods approaches to childhood well-being. We argue that there are additional layers of complexity due to the distinctiveness of children’s experiences of deprivation or ill-being. This paper is structured as follows. Sections 2 and 3 discuss the nature of mixed methods approaches and tensions. Sections 4 and 5 apply these debates to researching childhood well-being in particular, in both Northern and Southern contexts. Section 6 concludes and discusses future work.

Pathways from Casual Employment to Economic Security: the Australian Experience

Casual employment is extensive and has been increasing for more than two decades in Australia. The concept of casual employment used in the Australian context is unusual, but it is directly linked to benefit and rights exclusion within the regulatory framework governing employment. The expansion in casual employment has spread across all sectors, industries and occupations. Casual employment is associated with various forms of insecurity including income and employment insecurity. There are a number of ways in which the insecurity associated with casual employment could be reduced.

Are there gender and country of origin differences in immigrant labor market outcomes across European destinations?

The 1994–2000 waves of the European Community Household Panel are used to study the earnings of immigrants as compared to native workers in 15 European countries. At the time of arrival, there is a significant negative partial effect of foreign birth on individual earnings compared to the native born in the destination of around 40%. These differences vary across origins and destinations and by gender. Immigrant earnings catch-up to those of the native born after around 18 years in the destination. Schooling matters more for earnings for women, whereas, language skills are relatively more important for men.

African-American and white inequality in the nineteenth century American South: a biological comparison

The use of height data to measure living standards is now a well-established method in economic history. By using a new source of nineteenth century Texas state prison records, the present study contrasts the heights of comparable blacks and whites between the Civil War and Reconstruction in the American South. White stature exceeded black stature. Between 1850 and 1870, black stature declined by more than 1 cm but recovered toward the end of the nineteenth century. Postbellum white stature declined by more than 1 1/2 cm over the same period yet never recovered.