The 1990s constitute a paradigm shift from early to late retirement in Germany. This shift was marked by the implementation of policies that aim to extend the working life of older employees. Today, the German baby boomers find themselves in a late career phase and are approaching retirement, some birth cohorts have already retired. Demographic ageing and globalisation, challenge social welfare systems and demand competitiveness from national labour markets. During the past three decades the economic risks accompanied with these phenomena have increasingly been shifted from state-and firm-level stakeholders to individuals, for example by reducing options for early exit from employment, by delaying retirement, and by deregulation of employment contracts. Not all socioeconomic groups are equally affected. Researchers have raised concerns that the burden of the above-described trends are socially structured, e.g., by education, occupation, income, and sex. This is because some populations of older workers are more strongly affected by poor working and employment conditions than others and are lacking the prerequisites and motivators to extend the working life and will therefore be at higher risk of the negative consequences of a longer working life. Thus, to counteract existing and emerging social inequalities, more nuanced pension and labour market policies are required, which account for the excessive risks for health and labour participation that some groups of older workers experience. To provide sound advice for stakeholders and decision makers more research is needed in order to provide answers to the following questions, particularly for Germany:
• What is the contribution of work factors and the health-related lifestyle to educational inequalities in physical health among older workers in Germany?
• What is the contribution of work factors, health, and work ability to educational inequalities in early exits from employment in Germany?
• Are there social inequalities in the exposure to trajectories of precarious employment and their potential effect on mental health among older workers in Germany?
The aim of the present dissertation is to investigate these questions. The dissertation consists of three studies (I, II, III), each addressing one of the above questions. The studies were published in international peer-reviewed journals. All studies used data from the German lidA (leben in der Arbeit) study, a prospective cohort study representative of socially insured employees from the German baby boom birth cohorts 1959 and 1965 (Hasselhorn et al., 2014). Study I and II used data from the first three waves (2011, 2014, 2018), study III from all waves including wave four (2022). Only panel cases were investigated. Study I investigated the quantitative contribution of work factors and health behaviours to educational inequalities in physical health. Causal mediation analyses were conducted, including n=2653 panel cases. The study finds that work factors contribute 21% to inequalities in physical health between low and high educated women and 5% between low and high educated men (Rohrbacher & Hasselhorn, 2023). Health behaviours contributed additional 26% to these inequalities among women and 24% among men (Rohrbacher & Hasselhorn, 2023). Possibilities for development at work and the Body Mass Index may constitute key variables to level physical health inequalities among older female employees (Rohrbacher & Hasselhorn, 2023). Smoking and leisure-time physical activity may be key variables to level physical health inequalities among older male employees (Rohrbacher & Hasselhorn, 2023). Study II investigated the quantitative contribution of work factors, health, and work ability to educational inequalities in early exits from employment via disability pension, long-term unemployment, and unspecific early labour market exits. Causal mediation analyses were conducted, including n=2438 panel cases. The study finds that social inequalities in early exits through disability pension are mainly attributable to differences in work ability between educational groups and social inequalities in early exits through long-term unemployment mainly to differences in physical health (Rohrbacher & Hasselhorn, 2022). Study III investigated social inequalities in the exposure to trajectories of precarious employment and their effect on mental health. Group-Based Trajectory Modelling was used to compute employment quality trajectories over a follow-up period of 11 years. Associations between trajectory membership and mental health were tested using weighted logistic regression. N=1636 panel cases were included. The study finds that 20.2% of older women versus 5.5% of older men experienced a trajectory of precarious employment over 11 years during the late career (Rohrbacher et al., 2024). Among women, the experience of a precarious employment trajectory (versus non-precarious employment), increased the risk of poor mental health at follow-up. This was not observed among men (Rohrbacher et al., 2024). In synopsis, the studies highlight that the risk of experiencing poor health and reduced labour participation is structured by social positions. This dissertation focused mainly on social inequalities between educational groups and sexes. The use of high-quality quantitative survey data, partly in combination with employment-register data and the application of modern statistical methods are major strengths of the present dissertation. The results indicate that differences in work factors and health behaviours contribute to physical health inequalities to the disadvantage of low educated older employees (study I), that the exposure to a precarious employment trajectory increases the risk of poor mental health to the disadvantage of older female employees (study III), and that educational differences in health and work ability contribute to social inequalities in early exits from employment (study II). Improving working and employment conditions as well as supporting health-promotive behaviours and work ability are-when addressing disadvantaged groups-levers to counteract social inequalities in health and labour participation during the late career of older employees in Germany.