The Contribution of Assisted Reproduction to Completed Fertility: An Analysis of Danish Data

Assisted reproduction has a minor but increasing influence on childbearing trends in advanced societies. In Denmark, the use of assisted reproduction technology (ART) has become particularly widespread. At the same time, Danish women born in the late 1950s and the 1960s experienced stabilization or even a slight increase in their mean number of children. Broad availability and widespread use of assisted reproduction may become important factors contributing to maintaining relatively high completed fertility among the younger cohorts of Danish women. To explore this idea, we analyze and project cohort trends in fertility rates among native Danish women born in 1960‐78 and examine the likely contribution of assisted reproduction to these trends. The projected proportion of children born after ART treatment shows a substantial increase from 2.1 percent among women born in 1965 to 4‐5 percent among women born in 1978, with an estimated net impact of ART (as compared with the hypothetical situation where no ART treatment was available) on the order of 3‐4 percent. When intrauterine inseminations are included, this implies that up to 7 percent of children of those native Danish women born in 1975 and later will likely be conceived by infertility treatment.     

LOCATING CULTURE IN THE US AND CENTRAL EUROPE - A TRANSATLANTIC PERSPECTIVE ON CULTURAL STUDIES

This article attempts a comparative critique of interdisciplinary cultural analysis in the US and Central Europe. It tries to sketch out the different points of departure and methodological approaches used in American and British cultural studies on the side, and in German Kulturwissenschaften (cultural sciences) on the other side. Furthermore it is asked in which ways the critical political impetus of cultural studies can be made productive for the further advancement of Kulturwissenschaften, and how they could perform an innovative role for the understanding of problems posed by the current political and social situation in Central Europe.     

TEXTURES OF THE MODERN: VIENNESE CONTRIBUTIONS TO CULTURAL HISTORY AND URBAN STUDIES

The following essay recapitulates the findings of a research project on Viennese modernity, which since 1995 has involved a group of historians, political scientists, literary scholars and sociologists examining the different phases in the history of the city in the twentieth century from a transdisciplinary perspective. The point of departure for the project was its participants' dissatisfaction with a myopic image of twentieth-century Vienna increasingly constricted to literary and aesthetic practices, which has focused on the ‘golden age’ of high culture in the Habsburg capital of the fin-de-siècle while omitting crucial periods of the city's history, in particular the political and cultural crisis between 1918 and 1938, and the phase of material and cultural reconstruction after the ‘collapse of civilization’ that was Nazism.     

DATA-DRIVEN NONPARAMETRIC SPECTRAL DENSITY ESTIMATORS FOR ECONOMIC TIME SERIES: A MONTE CARLO STUDY

Spectral analysis at frequencies other than zero plays an increasingly important role in econometrics. A number of alternative automated data-driven procedures for nonparametric spectral density estimation have been suggested in the literature, but little is known about their finite-sample accuracy. We compare five such procedures in terms of their mean-squared percentage error across frequencies. Our data generating processes (DGP) include autoregressive-moving average (ARMA) models, fractionally integrated ARMA models and nonparametric models based on 16 commonly used macroeconomic time series. We find that for both quarterly and monthly data the autoregressive sieve estimator is the most reliable method overall.     

Die analytische Soziologie: Soziale Mechanismen, DBO-Theorie und Agentenbasierte Modelle

Within the analytical sociology, Peter Hedström — professor at School of Social Sciences of the Singapore Management University — developed an approach to come to valid explanations of social phenomena. In this article, his approach will be described and critically assessed. The approach is based on the micro-macro view in sociology. With the assistance of the so called DBO-theory, certain social mechanisms are formulated on the micro- and macro levels to come to a sufficient (middle-range) theory for the explanation of social phenomena. To investigate the validity of the theory, agent-based models are calculated.     

Know Your Counterparts: The Importance of Wording for Stakeholder Communication in Social Franchise Enterprises

VOLUNTAS: International Journal of Voluntary and Nonprofit Organizations - Social enterprises pursue a dual mission: on the one hand, they strive for social purpose, while on the other, they try to...     

How enduring were the inequalities among European immigrant groups in the United States?

A long-standing and unresolved issue in the study of racial and ethnic groups concerns the persistence of initial inequalities among groups. Recently it has surfaced again in the study of U.S. immigrant groups, in George Borjas's (1994) claim that the human capital differences among early-twentieth-century immigrant groups are reflected in the relative socioeconomic achievements of their third generations. Reexamining this claim, we find that Borjas's analysis hinges on a series of problematic decisions, such as his inclusion of non-European groups as well as his failure to take ethnically mixed ancestry into account and to compensate for the weak correspondence in eastern Europe between ethnic ancestry and the national frontiers of the early 1900s. We replicate a portion of his analysis, correcting for these problems. Our results reveal no correspondence between the literacy of the first generation and the educational attainment of the third among European groups. Borjas's analysis seems to go farthest astray in including non-Europeans, especially Mexicans, because of the more systematic legal and social liabilities suffered by these groups.     

Long‐Term Population Decline in Europe: The Relative Importance of Tempo Effects and Generational Length

It has recently been suggested that an end to further increases in the mean age of child‐bearing in Europe (ending the negative tempo effect on fertility) would have a substantial effect on population dynamics in terms of slowing population aging and decline and weakening the negative momentum affecting population size over the coming decades. On the other hand, stable population theory suggests that under sub‐replacement fertility conditions, a longer mean length of generations implies slower shrinking, and thus a relatively larger population in the very long run. This note compares the relative importance of the two effects analytically and with data for the 15‐country European Union. It also considers whether an increase in the mean age of childbearing will decrease the quantum of fertility. This question is highly relevant in the context of the effects of possible policies aiming to influence the tempo of fertility rather than the quantum directly. The results show that for the coming 200 years the effect of tempo changes clearly dominates, with the effect of a shorter mean length of generation only becoming visible thereafter. Even small tempo‐quantum interactions can overwhelm the generation‐length effect.