Sabine Otten

This chapter gives biographical information, and, more importantly, summarizes Sabine Otten's mein areas of research interests and -findings

Repeated games with endogenous separation

Producción CientíficaWe consider repeated games with endogenous separation – also known as voluntarily separable or voluntary partnership games – and their evolutionary dynamics. We formulate the replicator dynamics for games with endogenous separation, and provide a definition of neutral stability that guarantees Lyapunov stability in the replicator dynamics. We also provide existence results for monomorphic neutrally stable states in games with endogenous separation.Organización de Empresas y CI

Gender (in)equality at the kitchen table: A diary study on how parents’ coordination facilitates an equal task division and relationship quality

Although women's labour force participation has increased, women still lag behind in financial independence and men in spending time on parenting. Insight in individuals' explicit conversations with their partner about how to coordinate daily household, childcare and paid work may help to overcome these persistent inequalities. Using a daily diary design, the present study examined to what extent daily conversations with the partner about household, childcare and paid work can boost a more equal, fair task division and relationship quality among Dutch mothers and fathers in a heterosexual relationship (N = 1235 daily reported conversations nested in 157 participants; 66.2% female). Mixed model results showed that (1) on days when participants conversed more with their partner about household tasks, they reported a more egalitarian task division and higher satisfaction with and fairness of the task division, and higher relationship quality (2) this higher daily satisfaction with and perceived fairness of the task division (but not egalitarianism) were, in turn, associated with higher relationship quality and (3) conversations had limited spill-over effects to the next day, stressing the importance of daily coordination. Together, these findings imply that daily household coordination helps parents to overcome traditional gender roles and align with their desired work/family division

In and Out of Equilibrium II: Evolution in Repeated Games with Discounting and Complexity Costs

We explore evolutionary dynamics for repeated games with small, but positive complexity costs. To understand the dynamics, we extend a folk theorem result by Cooper (1996) to continuation probabilities, or discount rates, smaller than 1. While this result delineates which payoffs can be supported by neutrally stable strategies, the only strategy that is evolutionarily stable, and has a uniform invasion barrier, is All D. However, with sufficiently small complexity costs, indirect invasions - but now through 'almost neutral' mutants - become an important ingredient of the dynamics. These indirect invasions include stepping stone paths out of full defection

The use of an ‘acclimatisation’ heatwave measure to compare temperature-related demand for emergency services in Australia, Botswana, Netherlands, Pakistan, and USA

Background: Heatwaves have been linked to increased risk of mortality and morbidity and are projected to increase in frequency and intensity due to climate change. The current study uses emergency department (ED) data from Australia, Botswana, Netherlands, Pakistan, and the United States of America to evaluate the impact of heatwaves on ED attendances, admissions and mortality.Methods: Routinely collected time series data were obtained from 18 hospitals. Two separate thresholds (≥4 and ≥7) of the acclimatisation excess heat index (EHIaccl) were used to define hot days . Analyses included descriptive statistics, independent samples T-tests to determine differences in case mix between hot days and other days, and threshold regression to determine which temperature thresholds correspond to large increases in ED attendances.Findings: In all regions, increases in temperature that did not coincide with time to acclimatise resulted in increases in ED attendances, and the EHIaccl performed in a similar manner. During hot days in California and The Netherlands, significantly more children ended up in the ED, while in Pakistan more elderly people attended. Hot days were associated with more patient admissions in the ages 5-11 in California, 65-74 in Karachi, and 75-84 in The Hague. During hot days in The Hague, patients with psychiatric symptoms were more likely to die. The current study did not identify a threshold temperature associated with particularly large increases in ED demand.Interpretation: The association between heat and ED demand differs between regions. A limitation of the current study is that it does not consider delayed effects or influences of other environmental factors. Given the association between heat and ED use, hospitals and governmental authorities should recognise the demands that heat can place on local health care systems. These demands differ substantially between regions, with Pakistan being the most heavily affected within our study sample

Mineral reaction kinetics constrain the length scale of rock matrix diffusion

Mass transport by aqueous fluids is a dynamic process in shallow crustal systems, redistributing nutrients as well as contaminants. Rock matrix diffusion into fractures (void space) within crystalline rock has been postulated to play an important role in the transient storage of solutes. The reacted volume of host rock involved, however, will be controlled by fluid-rock reactions. Here we present the results of a study which focusses on defining the length scale over which rock matrix diffusion operates within crystalline rock over timescales that are relevant to safety assessment of radioactive and other long-lived wastes. Through detailed chemical and structural analysis of natural specimens sampled at depth from an active system (Toki Granite, Japan), we show that, contrary to commonly proposed models, the length scale of rock matrix diffusion may be extremely small, on the order of centimetres, even over timescales of millions of years. This implies that in many cases the importance of rock matrix diffusion will be minimal. Additional analyses of a contrasting crystalline rock system (Carnmenellis Granite, UK) corroborate these results

Declared non-essential during the COVID-19 pandemic: Effects on professional identity

This study applies a social identity lens to show that, during the COVID-19 pandemic, the Dutch government’s classification of occupations and labor market sectors as essential versus non-essential imposed a professional identity threat to those categorized as non-essential. Specifically, we hypothesized (1) that non-essential workers in the Netherlands would report lower professional identification (PI) during the pandemic relative to essential workers; (2) that non-essential workers’ mandatory shift to working from home and working fewer hours would (partially) explain their lower PI relative to essential workers; (3) that gender differences would emerge in the impact of categorization as (non-)essential worker on PI levels; and (4) that lower PI would negatively relate to work productivity and performance during the pandemic. Empirical evidence based on three cross-sectional datasets sampled among the Dutch working population during two peak waves of COVID-19 infections and national lockdowns (May/June 2020; Study 1: N = 371; November/December 2020, Study 2: N = 467; Study 3 = 735) all confirmed that non-essential workers reported lower PI relative to essential workers. The explanation for this outcome varied at different stages in the pandemic. Study 1 results showed that lower PI among those declared non-essential was partially explained by non-essential workers’ work location (home-bound) and reduced work hours, but only during the 1st peak wave. As the pandemic continued (2nd peak wave; Study 2 and 3), gender differences emerged, with more negative consequences of being classified non-essential for women than men. Non-essential workers’ lower PI levels were also associated with lower work productivity and performance. These findings underscore the importance of understanding social identity processes during the pandemic. We discuss socio-psychological ramifications of government regulations to control health crises, given how these may inadvertently undermine the professional identity of over half a working population in society

β-catenin tyrosine 654 phosphorylation increases Wnt signalling and intestinal tumorigenesis

Objective: Deregulation of the Wnt signalling pathway by mutations in the Apc or β-catenin genes underlies colorectal carcinogenesis. As a result, β-catenin stabilises, translocates t