Jana Jung

• This dissertation is a compilation of publications and submitted publication manuscripts that seek to improve the understanding of modern partnership trajectories. Romantic relationships constitute one of the most important dimensions in a person’s life. They serve to satisfy social and emotional needs (Arránz Becker, 2008) and have an impact on various other dimensions of life. Since the 1970s, partnership formation has been characterized by increased heterogeneity, has become less ordered and much more diverse in terms of living arrangements and the number of unions across the life course (Helske et al, 2015; Ross et al, 2009). This dissertation argues that while partnerships have become more unstable, the need for attachment and the importance of relationship have remained high, if not increased, as evidenced by the prevalence of couple relationships that have remained quite stable (Eckhardt, 2015). The life course perspective (Elder, 1994; Elder et al., 2004; Mayer, 2009) offers an appropriate framework for the understanding ofThis dissertation is a compilation of publications and submitted publication manuscripts that seek to improve the understanding of modern partnership trajectories. Romantic relationships constitute one of the most important dimensions in a person’s life. They serve to satisfy social and emotional needs (Arránz Becker, 2008) and have an impact on various other dimensions of life. Since the 1970s, partnership formation has been characterized by increased heterogeneity, has become less ordered and much more diverse in terms of living arrangements and the number of unions across the life course (Helske et al, 2015; Ross et al, 2009). This dissertation argues that while partnerships have become more unstable, the need for attachment and the importance of relationship have remained high, if not increased, as evidenced by the prevalence of couple relationships that have remained quite stable (Eckhardt, 2015). The life course perspective (Elder, 1994; Elder et al., 2004; Mayer, 2009) offers an appropriate framework for the understanding of partnership formations throughout the life course. This perspective stresses the path dependency of the life course as well as the interdependencies of life domains (Bernardi et al., 2019). Thus, it can be argued that conditions, resources, and experiences in youth have a substantial influence on later life course outcomes. Given the increasing heterogeneity of partnership trajectories, research to understand partnership processes cannot be based only on single events (e.g., marriage or divorce) or life stages, but must be explored in a dynamic context and over a longer period of time. In sum, this thesis argues that partnership trajectories have to be considered from a holistic perspective. Not only single transitions or events are useful to describe modern partnership histories adequately, but rather the whole process. Additionally, as partnership trajectories are linked to various outcomes (e.g., economics, health, effects on children), it is therefore highly relevant to improve our understanding of partnership dynamics and their determinants and consequences. Findings in this field of research contribute to a better understanding of how childhood and youth are of prospective importance for the later partnership trajectories and whether there are any long-term effects of the conditions and resources formed and stabilized in youth, which then help to understand and explain partnership dynamics. Thus, the interest of this thesis lies in the longitudinal description and prediction of the dynamics of partnership trajectories in light of the individual resources formed and stabilized in youth, as well as in the investigation of the consequences of different partnership trajectory patterns on individual well-being. For these objectives, a high demand on the data is required, as prospective data at the beginning of the partnership biography are needed, as well as data on current life dimensions and the detailed partnership history. The German LifE Study provides this particular data structure as it examines life courses of more than 1,300 individuals from adolescence to middle adulthood. With regard to the overall aim of this dissertation, the main conclusion is that early life conditions, experiences, and resources influence the dynamics of individual partnership trajectories. The results illustrate that youth matters and that characteristics and resources anchored in youth influence the timing of early status passages, which sets individuals on specific life paths. However, in addition to personal and social resources, partnership trajectories were also significantly influenced by individuals’ sociodemographic placement. Additionally, individual resources are also linked to the overall turbulence or stability of partnership trajectories. This overall dynamic, which is reflected in different partnership patterns, influences individual well-being, with stability being associated with greater satisfaction, and instability (women), or permanent singlehood (men), having a negative impact on well-being. My analyses contribute to life course research by examining path dependency against the background of various individual factors (socio-structural and psychological characteristics) to model decision-making processes in partnerships in more detail. They do so by including also non-cohabitational union types in the analyses, by accounting for pre-trajectory life conditions and resources, and, most importantly, by modeling the partnership trajectory in a holistic and dynamic perspective, applying this perspective to appropriate and modern statistical methods on a unique dataset.…