Age at marriage and family size: social causation and social selection hypotheses

1972 ◽  
Vol 4 (1) ◽  
pp. 117-134 ◽  
Author(s):  
Joan Busfield

The familiar and well-established negative association between a woman's age at marriage and family size has received somewhat less attention in recent years. No doubt this is because, with the reduction in fertility of the past century, the observed differentials appear less striking and seem less significant. Age at marriage is a less obvious determinant of family size than in the past. Glass & Grebenik (1954), commenting on the data produced by the 1946 Family Census, emphasized the decreasing importance of the association both absolutely and relatively. Contrasting the completed fertility of the 1900–09 and the 1925 marriage cohorts in Great Britain (Table 1), they argued that, though for all, married women the relative influence of age at marriage was unchanged, the figures for fertile marriages only (those where the wife had at least one child) appeared to indicate ‘that age at marriage and fertility were not quite so tightly linked for the more recent group’. And they added ‘this is the kind of development which would be expected with the increasing spread of family planning’.

2019 ◽  
Vol 41 (2) ◽  
pp. 212-234
Author(s):  
Joseph J. Merry ◽  
Donna Bobbitt-Zeher ◽  
Douglas B. Downey

In many parts of the world, fertility has declined in important ways in the past century. What are the consequences of this demographic change? Our study expands the empirical basis for understanding the relationship between number of siblings in childhood and social outcomes among adults. An important recent study found that for each additional sibling an individual grows up with, the likelihood of divorce as an adult declines by 3%. We expand this work by (a) determining whether the original pattern replicates in the National Longitudinal Study of Adolescent to Adult Health and (b) extending the analysis beyond divorce to consider whether growing up with siblings is related to prosocial adult behaviors (relationships with parents, friends, and views on conflict management with one’s partner). Our results confirm a negative association between number of siblings and divorce in adulthood. We find mixed results related to other prosocial adult behaviors.


Author(s):  
Eve M. Brank

Being married and having children brings certain legal responsibilities and privileges. The current chapter addresses dating and other activities that occur prior to marriage or are related to getting married. In U.S. culture, dating is an important step before marriage and has undergone extreme changes throughout the past century. Once there is a promise to marry other issues are important to consider such as prenuptial agreements, breaches of promise to marry, and the choice of surname for one or both members of the marrying couple. Of course, not all individuals or romantic couples choose marriage. Rates of nonmartial cohabitation rates have continued to rise. These generational changes in premarital and nonmartial behaviors have important implications for contextualizing the current status of marriage.


1941 ◽  
Vol 35 (3) ◽  
pp. 443-461 ◽  
Author(s):  
Beatrice Orent ◽  
Pauline Reinsch

Recently, certain small uninhabited islands in the central Pacific Ocean have assumedsudden importance for the British Empire and the United States. Their value as landing places for commercial aviation and as strategic bases for air and naval forces is being increasingly recognized. Acquired during the past century by Great Britain and the UnitedStates, many of these islands have been the object of conflicting claims to sovereignty by the two nations. To clarify their status, it has been found desirable to review the past practice of these states and to examine those factors which were considered adequateto create sovereign rights over uninhabited islands in the Pacific.


2000 ◽  
Vol 10 ◽  
pp. 399-408 ◽  
Author(s):  
S.J. Connolly

AbstractTHE political, administrative and social consequences of the union of Great Britain and Ireland, and even more the eventual unravelling of the structures it created, have for the greater part of the past century provided Irish historians with a major theme. By contrast the measure itself has received little sustained analysis or discussion. F.R. Bolton's monograph, first published in 1966, remains – more than three decades later – the standard reference. In part this is a tribute to the depth, breadth and penetration of Bolton's account. But there is also at least the suggestion that the negotiation and passage of the union legislation, during 1799–1800, is to be seen as unproblematic, a relatively straightforward event providing a terminus or a starting point for discussion of the more complex and challenging periods on either side.


1971 ◽  
Vol 3 (3) ◽  
pp. 259-265 ◽  
Author(s):  
P. A. Van Keep

From part of a survey conducted in five European countries, Belgium, France, Great Britain, Italy and West Germany, data are given on the opinions of 4207 fertile married women and their husbands on ideal family size and on whether their existing children were planned or not. Data are tabulated according to the respondents' ages and the number of children in their existing families. Differences and similarities between various countries are discussed.


PeerJ ◽  
2016 ◽  
Vol 4 ◽  
pp. e2381 ◽  
Author(s):  
Kevin Winker

The number of species recognized inAulacorhynchustoucanets has varied tremendously over the past century. Revisors seem to disagree on whether head and bill coloration are useful indicators of species limits, especially in theA.“prasinus” complex. Using morphometrics, I tested the hypothesis that the major color-based subspecific groups ofA.“prasinus”sensu latoare simply “cookie-cutter” (i.e., morphologically nearly identical) toucanets with different head and bill colorations. Univariate and multivariate analyses show that they are not simply morphological replicates of different colors: a complex array of morphometric similarities and dissimilarities occur between the major subspecific groups, and these variations differ between the sexes. Latitude and longitude had a small but significant association with female (but not male) PC1 and PC2. Hybridization and intergradation were also considered using plumage and bill characters as a surrogate to infer gene flow. Hybridization as indicated by phenotype appears to be substantial betweenA. “p.” cyanolaemusandA. “p.” atrogularisand nonexistent between other major groups, although from genetic evidence it is likely rare betweenA. “p.” albivittaandA. “p.” cyanolaemus. The congruence and complexities of the morphological and color changes occurring among these groups suggest that ecological adaptation (through natural selection) and social selection have co-occurred among these groups and that species limits are involved. Further, hybridization is not evident at key places, despite in many cases (hypothetical) opportunity for gene flow. Consequently, I recommend that this complex be recognized as comprising five biological species:A. wagleri, prasinus, caeruleogularis, albivitta,andatrogularis. Four of these also have valid subspecies within them, and additional work may eventually support elevation of some of these subspecies to full species. Species limits in South America especially need more study.


2020 ◽  
Vol 4 (4) ◽  
pp. 365-381
Author(s):  
Ny Anjara Fifi Ravelomanantsoa ◽  
Sarah Guth ◽  
Angelo Andrianiaina ◽  
Santino Andry ◽  
Anecia Gentles ◽  
...  

Seven zoonoses — human infections of animal origin — have emerged from the Coronaviridae family in the past century, including three viruses responsible for significant human mortality (SARS-CoV, MERS-CoV, and SARS-CoV-2) in the past twenty years alone. These three viruses, in addition to two older CoV zoonoses (HCoV-229E and HCoV-NL63) are believed to be originally derived from wild bat reservoir species. We review the molecular biology of the bat-derived Alpha- and Betacoronavirus genera, highlighting features that contribute to their potential for cross-species emergence, including the use of well-conserved mammalian host cell machinery for cell entry and a unique capacity for adaptation to novel host environments after host switching. The adaptive capacity of coronaviruses largely results from their large genomes, which reduce the risk of deleterious mutational errors and facilitate range-expanding recombination events by offering heightened redundancy in essential genetic material. Large CoV genomes are made possible by the unique proofreading capacity encoded for their RNA-dependent polymerase. We find that bat-borne SARS-related coronaviruses in the subgenus Sarbecovirus, the source clade for SARS-CoV and SARS-CoV-2, present a particularly poignant pandemic threat, due to the extraordinary viral genetic diversity represented among several sympatric species of their horseshoe bat hosts. To date, Sarbecovirus surveillance has been almost entirely restricted to China. More vigorous field research efforts tracking the circulation of Sarbecoviruses specifically and Betacoronaviruses more generally is needed across a broader global range if we are to avoid future repeats of the COVID-19 pandemic.


VASA ◽  
2018 ◽  
Vol 47 (3) ◽  
pp. 165-176 ◽  
Author(s):  
Katrin Gebauer ◽  
Holger Reinecke

Abstract. Low-density lipoprotein cholesterol (LDL-C) has been proven to be a causal factor of atherosclerosis and, along with other triggers like inflammation, the most frequent reason for peripheral arterial disease. Moreover, a linear correlation between LDL-C concentration and cardiovascular outcome in high-risk patients could be established during the past century. After the development of statins, numerous randomized trials have shown the superiority for LDL-C reduction and hence the decrease in cardiovascular outcomes including mortality. Over the past decades it became evident that more intense LDL-C lowering, by either the use of highly potent statin supplements or by additional cholesterol absorption inhibitor application, accounted for an even more profound cardiovascular risk reduction. Proprotein convertase subtilisin/kexin type 9 (PCSK9), a serin protease with effect on the LDL receptor cycle leading to its degradation and therefore preventing continuing LDL-C clearance from the blood, is the target of a newly developed monoclonal antibody facilitating astounding LDL-C reduction far below to what has been set as target level by recent ESC/EAS guidelines in management of dyslipidaemias. Large randomized outcome trials including subjects with PAD so far have been able to prove significant and even more intense cardiovascular risk reduction via further LDL-C debasement on top of high-intensity statin medication. Another approach for LDL-C reduction is a silencing interfering RNA muting the translation of PCSK9 intracellularly. Moreover, PCSK9 concentrations are elevated in cells involved in plaque composition, so the potency of intracellular PCSK9 inhibition and therefore prevention or reversal of plaques may provide this mechanism of action on PCSK9 with additional beneficial effects on cells involved in plaque formation. Thus, simultaneous application of statins and PCSK9 inhibitors promise to reduce cardiovascular event burden by both LDL-C reduction and pleiotropic effects of both agents.


1901 ◽  
Vol 51 (1309supp) ◽  
pp. 20976-20977
Author(s):  
W. M. Flinders Petrje
Keyword(s):  

Author(s):  
Matthew Bagot

One of the central questions in international relations today is how we should conceive of state sovereignty. The notion of sovereignty—’supreme authority within a territory’, as Daniel Philpott defines it—emerged after the Treaty of Westphalia in 1648 as a result of which the late medieval crisis of pluralism was settled. But recent changes in the international order, such as technological advances that have spurred globalization and the emerging norm of the Responsibility to Protect, have cast the notion of sovereignty into an unclear light. The purpose of this paper is to contribute to the current debate regarding sovereignty by exploring two schools of thought on the matter: first, three Catholic scholars from the past century—Luigi Sturzo, Jacques Maritain, and John Courtney Murray, S.J.—taken as representative of Catholic tradition; second, a number of contemporary political theorists of cosmopolitan democracy. The paper argues that there is a confluence between the Catholic thinkers and the cosmopolitan democrats regarding their understanding of state sovereignty and that, taken together, the two schools have much to contribute not only to our current understanding of sovereignty, but also to the future of global governance.


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