Educational assortative mating and time use in the home

This study examines the association between individuals' educational assortative mating and time spent on child care and housework. Focus is put on hypogamous couples, or couples in which wives have more education than their husbands. Relative resources and gender revolution frameworks are considered as contexts to explain why hypogamous couples may share their time differently than other couples. A series of ordinary least squares regressions with population and sampling weights are employed using American Time Use Survey data from 2003 to 2018. Three, separate analyses using relative education, gender, and all educational pairings as the independent variables of interest are presented with child care and housework as the dependent variables. The current findings show that men in hypogamous marriages perform about 10 min more of child care per day on average than their peers in hypergamous and homogamous marriages, and that this comes primarily from basic care activities. This accounts for approximately 43% of the difference between men and women in the average amount of time spent on child care. No clear pattern of significance is apparent comparing individuals’ time spent on housework by relative education, suggesting that housework and child care have evolved differently in the context of gendered domestic responsibilities. Men in hypogamous marriages are more egalitarian in their sharing of child care. However, this is only true for couples in which men have at least a high school diploma and women are highly educated.     

父母的婚姻教育匹配与子女学业表现

本研究基于2015年中国教育追踪调查（CEPS）数据,以父母婚姻教育匹配构建的“新型家庭文化资本”为视角,探讨不同婚配模式下“共同养育联盟”的水平与新型家庭文化资本被激活的效率对子女学业表现影响的作用路径。研究表明,与低等教育同质婚家庭的子女相比,向上婚以及高等教育同质婚家庭的子女学业表现更好。其二,父母婚姻教育匹配对子女学业表现的影响存在教育差距效应,随着父母间教育跨层级的增加,向上婚家庭中子女学业表现的优势递增,向下婚家庭中子女学业表现的劣势进一步扩大。其三,父母婚姻教育匹配模式对学业的影响因子女性别而异,向上婚和高等教育同质婚减弱了男孩的学习劣势,向下婚扩大了男孩的学习劣势。最后,家庭中的共同养育联盟对子女学业表现的影响发挥了部分中介作用。向上婚家庭的父亲与母亲在教养分工中建立了更互补的关系,共同养育联盟水平较高,更有效地激活了新型家庭文化资本,促进子女的学业表现。“强强联合”的婚姻教育匹配虽然成为不平等再生产的“温床”,但是,通过建立高水平的共同养育联盟这一中介路径提高新型家庭文化资本被激活的效率,则可能减缓教育不平等的代际传递。     

Mating and diapause in hibernating adults ofMenida scotti puton (Heteroptera: Pentatomidae)

InMenida scotti aduts which mate during hibernation, we examined the effect of photoperiod on diapause induction in terms of the developmental degree of reproductive organs and corpora allata. In a hibernating population, mating season and physiological changes related to dipause were investigated. When newly emerged adults were reared under long- or short-day conditions, reservoir of the ectodermal accessory gland and corpora allata in males developed, while the developments of ovary and corpora allata in females were suppressed under both conditions. This suggests that diapause of this species is induced only in females independently photoperiodic conditions during adult stage. In a hibernating population, mating was observed from early to late November and from late March to early May. Observations of the development of reproductive organs and corpora allata suggest that diapause is induced only in females in the former period, while both sexes are not in diapause in the latter period.     

Lek mating system and its impact on male annihilation technique

Summary Simulation models were presented which describe the matings inside a lek. The size of the lek was assumed to follow a poisson distribution, the dominance factor of each of the males was drawn from a gamma distribution, and the mating probability for each male was determined by its mating effectiveness raised to female mating factor divided by the sum of all the mating effectivenesses raised to this power. The mating probatility for each male and the actual matings were determined by Monte Carlo simulation. Based on the simulation data, the effects of female mating factor and size of the lek on the frequency of actual matings accomplished by the males inside the lek were discussed. In the case of male annihilation, the mean number of effective matings per male in the lek, calculated from the frequency of actual matings weighted by the effective mating ratio, was used to evaluate the efficiency of male annihilation method.     

女性择偶偏好的周期转换效应：三种解释视角

进化心理学的研究显示,女性更喜欢那些拥有男性化面孔及特定体味、身体对称、外表健康的男性,并且这种偏好会随着女性的月经周期而发生转变。在排卵期表现出明显的男性化偏好,而在其他时段偏好不明显,该效应被称为＂周期转换效应＂。通过梳理三种主流的解释视角,即基因选择假设、激素刺激假设和排卵引起知觉偏差的假设,结合＂周期转换效应＂遇到的挑战,从而指出未来的研究方向。     

人口结构失衡与犯罪研究：回顾、借鉴与展望

通过对现有东西方人口结构与犯罪关系文献的梳理和总结,笔者提出了适合研究性别比偏高亚洲国家的假设框架,以及可婚配男（女）性比例与犯罪率的u型假说。对中国1982—2008年人口年龄一性别结构与犯罪率数据探索性分析显示：反映人口年龄一性别结构的青年男性比例与可婚配男性比例的波动与犯罪率的波动高度一致,未来婚姻市场可婚配男性比例的不断升高将成为影响犯罪的主要人口结构因素。     

Immigration and status exchange in Australia and the United States

This paper evaluates the status exchange hypothesis for Australia and the United States, two Anglophone nations with long immigration traditions whose admission regimes place different emphases on skills. Using log-linear methods, we demonstrate that foreign-born spouses trade educational credentials via marriage with natives in both Australian and U.S. marriage markets and, moreover, that nativity is a more salient marriage barrier for men than for women. With some exceptions, immigrant spouses in mixed nativity couples are better educated than native spouses in same nativity couples, but status exchange is more prevalent among the less-educated spouses in both countries. Support for the status exchange hypothesis is somewhat weaker in Australia partly because of lower average levels of education compared with the United States and partly because of the less sharply defined educational hierarchy at the postsecondary level.     

Effects of fear of negative social evaluation in interaction with potential partners: experimental study of first encounters / Efectos del temor a la evaluación social negativa en interacción con parejas potenciales: estudio experimental de los primeros encuentros

Abstract

This study used an experimental procedure to evaluate the effects of fear of negative social evaluation (FNSE) on courtship strategies and the ability to interact with the opposite sex. 108 university students participated in this study with a mean age of 19.6. Prior to the experimental procedure, FNSE levels were measured. Then two photographs of people of the opposite sex were shown, one more attractive than the other, and the participants were informed that they would meet one of them. Levels of anxiety and self-presentation motivation (SPM) were measured before the planned interaction. Results show that people with low levels of FNSE have positive expectations of reciprocity when they are about to meet a person that they find attractive. Women, but not men, with high levels of FNSE report higher SPM with less attractive people than with more attractive people. High levels of FNSE are associated with a loss of calm in the situation of meeting a person of the opposite sex. Implications of these results are discussed in the context of courtship strategies.     

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.

雌性动物多次交配的经济学原因

选择投资型繁殖策略的雌性动物提高繁殖能力的关键是获得尽可能多的彩礼,增加对后代的投资,提高抚育子代的成活率。生物学理论认为雌性动物在交配行为的选择时,多次交配不具有进化优势,只有尽可能少的交配次数才是雌性动物的合理选择。从经济学角度看,雌性动物的多次交配和尽可能少的交配次数的交配行为都是符合其投资型繁殖策略的经济选择的,都能提高彩礼的获得量而提高繁育子代的遗传收益。