A common interpretation of the age gap in electoral turnout is that younger cohorts are apathetic and part of a generation that is absent from political life. Still, youth political participation differs across European countries, and cross- national variation in the age gap has been rarely examined in the literature. This paper, therefore, argues that unequal voting in Europe is due not to a lack of interest in the public good but rather to a combination of contextual and individual factors. This study examines young and older individuals' engagement with electoral politics in 26 European countries using the European Social Survey data between 2008 and 2018. Specifically, this study addresses the questions of (1) what context-related factors determine the age gap in voting between old and young citizens and (2) why the age gap in voting is smaller in some countries than in others. The results show that the age gap varies considerably across countries. The OLS and FE regressions results suggest that government expenditure, the share of migrants, and the age of democracy influence the level of age gap in voting. The findings on macroeconomic and immigration factors raise methodological concerns.

Using evolutionary and sociocultural theories, the current study examined what people consider important when entering an age gap relationship, willingness to accept a potential age discrepant partner, likelihood of entering an age gap relationship, and the importance of sex in relationships. Differences were predicted for older and younger potential partners as well as for short term or long term relationships in participants 30-50 years old. However, it seems that only men are willing to break dating norms for casual relationships, while women chose the traditional older male-younger woman relationship. For marriage, the pattern showed that participants preferred the traditional older male-younger female relationship, as well.

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This dissertation consists of four chapters on the economics of marriage and divorce in Iran. The first chapter outlines major forces driving the recent transitions in Iran's marriage market. Age structure of the population, the rise of women's education, marriage and divorce laws, and fertility decline are the four main forces influencing marriage transitions, that is, the age of marriage, couple's age and education gaps, quality of marriage (stability, education status of children), and women's power within marriage. Chapter two looks at the change in age structure that influences the sex ratio. I consider the influence of the sex ratio on couples' age and education gaps using data from multiple national surveys from 1984-2007. The findings of this chapter show that a lower sex ratio, i.e. a greater supply of marriage-age women, increases the bargaining power of men at the time of marriage and thereby increases their ability to marry younger and more educated women. In chapter three, I evaluate the effects of demographic change, the sex ratio, and policy change, particularly the provision of family planning programs through health clinics on delayed marriage in rural Iran. I use data from Iran's 2000 Demographic and Health Survey to estimate a hazard model of timing of marriage. The results show that a lower sex ratio decreases the chances of a woman finding a man five years older, and easier access to family planning decreases her probability of marriage. In chapter four, I provide a legal history of Iran's marriage and divorce laws and then discuss how changes in the legal structure of marriage and divorce alter the terms of marital bargaining and force women to circumvent inequitable Iranian laws to improve their position. Then, I present a model of how Mahrieh could improve a woman's position within the household in light of the unequal divorce rights favoring men. As women cannot exit their marriage, they request a conditional and legally enforceable bond known as Mahrieh from their husbands to secure themselves against the risks of divorce or maltreatment within marriage. / Ph. D.

Biological and social factors determines human personality. Birth order and its influence rank among strong phenotype forming factors. Practical application of the knowledge is complicated due the lack of evidence in this area in the Czech Republic. In our study, we focused on the role of age-gap between siblings and the role of gender on the birth order in education. Proportion of firstborns in various group of biology students were analysed. We found significantly higher proportions of firstborns than expected. The results were compared to the sample from the years 1990-1995. A small decrease in firstborns representation is observed. We also find big influence of gender and age-gap between siblings on the effects. Decrease in age-gaps increases the proportion of firstborns. Similar effects were found in personality traits data. Our study is unfortunately limited due to small numbers of participants. We suggest replication of our results and further testing of the effects.

This thesis explores the association between the age gap between parents and health outcomes for children in Sub-Saharan Africa. An average man-older age gap between partners has been observed all over the world and is the largest in many Sub-Saharan African countries. A large age gap is common in patriarchal societies and has been associated with less female autonomy and impeded decision-making for the couple, resulting in less contraceptive use and a possible higher risk of interpersonal violence. This thesis examines another association with age gaps by focusing on the health outcomes for children in families with large and small age gaps between the mother and her partner. It is hypothesized that children will have worse health outcomes in families where the age gap between the mother’s partner and the mother herself is larger than average. Using data from the Demographic and Health Surveys (DHS), multilevel logistic regression is run to test the association between three health indicators while controlling for confounding variables such as mother’s age, education level and wealth. The health indicators are treatment of fevers, vaccination against measles and underweight. The results show some statistically significant associations, with all three variables supporting the hypothesis that children in age heterogamous families are doing worse. Children of couples with a larger than average age gap have lower likelihood of being treated for fever or cough, and a higher likelihood of being underweight, and children of couples with a smaller than average age gap have a higher likelihood of having received the first measles vaccination. The results show that the age gap between parents is a factor to take into consideration when studying child health and family structures in Sub-Saharan Africa.