Table of contents Considering the influence of sexual frequency on age of menopause, Megan Arnot [et al.]............................................ 12 Early-life adversities and the presence of pathological personality traits in young adulthood, B´elaBirk´as[et al.]............................. 13 Reproductive Conflict and Child Mortality in Four Countries: A Cross-Sectional Study, Dugald Foster [et al.].............................. 14 Inflammaging: blame the sons. Number of sons and maternal C-reactive protein level among postmenopausal women., Andrzej Galbarczyk [et al.]......... 15 Is C-reactive protein (CRP) a valid biomarker for capturing the trade-off be- tween immunity and reproduction during the female menstrual cycle?, Gabriella Kountourides [et al.].................................. 16 A Closer Look at Global Prevalence of Obstetric Fistula, Lexi Lang [et al.]... 18 Why are men muscular? Tests of reproductive, hormonal and ecological hy- potheses to explain variation in human male muscularity within populations of Bangladeshi and British men., Kesson Magid.................... 19 Testing the bargaining model of depression in a forager-horticulturalist soci- ety, Sarah Myers [et al.]................................ 20 The origin of medicine and the placebo effect, Michel Raymond.......... 21 Understanding Reproductive Health in Ethiopia, Rose Stevens [et al.]...... 22 Keeping up with the reproduction: short-legged edition, Anita Magdalena Zal- isz [et al.]........................................ 24 Apolipoprotein E (ApoE) polymorphism and women's reproductive success, Joanna Zyrek_ [et al.]...................................... 26 1 Do affective factors predict individual differences in facial expression recogni- tion?, Sarah A. H Alharbi [et al.]........................... 27 Overlap in social networks drives cooperative norms and strategic behavior, Curtis Atkisson......................................... 28 The effect of variation in social encounters on human heuristic strategies, Ine Aertgeerts [et al.].................................... 29 Evolution of the Family: Theory and Implications for Economics, Ingela Alger [et al.]............................................ 31 Does alloparental care vary across a rural-urban gradient in north-western Tan- zania?, Hassan Anushe [et al.]............................. 32 Further exploration of the evolutionary tradeoffs in psychopathy: is there a fertility-mortality tradeoff?, Nevena Batini´c[et al.]................. 33 Humans do conceal sex across cultures. But why?, Yitzchak Ben Mocha [et al.]. 34 Sex differences in an indicator of stress in a contemporary hunter-gatherer popu- lation, J. Colette Berbesque [et al.].......................... 35 New Challenges to the Comparative Evolutionary Social Sciences, Monique Borg- erhoff Mulder...................................... 36 Sexual division of labour varies with sex ratio and residence pattern in rural China., Yuan Chen [et al.]............................... 37 Potential demographic variables underlying cross-cousin marriage among the Yanomamo and Dogon people, Arianna Dalzero......................... 38 The Importance of Life History for the Evolution of Social Learning, Dominik Deffner [et al.]...................................... 39 Quantifying spillover effects in cooperative behaviour from common to rare social interaction types, Peter Dewitte [et al.]........................ 40 The evolutionary transition to theory of mind, Slimane Dridi [et al.]....... 42 Costly Religious Behaviours in Tibetan Populations, Cai Rang Dung Zhi [et al.]. 43 Navigating Landscapes: The Life Course of Mobility in a Historical Dutch Pop- ulation, Natalia Fedorova [et al.]........................... 45 Same-sex Friendships among Hunter-Gatherers, Tommy Flint........... 46 2 Inference of ecological and social drivers of human brain-size evolution, Mauricio Gonzalez-Forero [et al.]................................. 47 Sugar consumption and variation of phenotypical traits in humans (cognition, choices, cooperation)., L´eonardGuillou [et al.].................... 48 Gossip discrimination: A novel mechanism to stabilize cooperation in models of indirect reciprocity with endogenous norms, Toby Handfield [et al.]........ 49 Risk aversion and prosocial preferences: Considering adaptive mechanisms to deal with highly uncertain environments, Shogo Homma [et al.]............. 50 Ecological predictors of allomaternal care across human societies, Adrian Jaeggi [et al.]............................................ 51 A brief analysis of communication in common pool resources and its potential role in sustainability., Oliver Juan.......................... 52 Testing evolutionary theories of inter-group conflicts: support for individual se- lection models, Jaakko Junikka [et al.]........................ 53 Near the Knuckle: Using Traveller Bare-Knuckle Contests to test hypotheses about male-male aggression, Robert King...................... 54 Cognitive ability and fertility amongst Swedish men Evidence from 18 cohorts of military conscription, Martin Kolk [et al.]...................... 55 Kinship Ties Across the Lifespan in Human Communities, Jeremy Koster [et al.] 56 Ritual Behavior, Religious Badges, and Within-Group Trust, Martin Lang [et al.] 57 Shared interests or sexual conflict? Spousal age gap, women's empowerment & fertility in rural Tanzania, David Lawson [et al.].................. 59 Current and childhood environmental harshness are linked to adult levels of co- operation, Niels Lettinga [et al.]............................ 60 Early Plant Learning in Fiji, Rita Mcnamara [et al.]................ 61 A natural history of song, Samuel Mehr [et al.]................... 62 Dyadic patterns of smiling predict interactive styles and outcomes of face-to-face negotiation., Marc Mehu................................ 63 Conflicts within and between groups over military alliances inhibit the evolution of large-scale human societies, Alberto Micheletti [et al.].............. 64 3 How does the impact of social information depend on its distribution?, Lucas Molleman [et al.].................................... 65 Ecological predictors of gender inequality: A 54-nation study of ecology, oppor- tunity, and economic inequality, Naomi Muggleton................. 67 Universality and linguistic experience in the perception of speech rhythm, and its relevance for speech evolution, Mikhail Ordin [et al.]................ 68 Who cares? Demography and cooperative breeding in Agta foragers, Abigail E Page [et al.]....................................... 69 Witches or wizards? The co-evolution of witchcraft phenotypes and social sys- tems, Sarah Peacey [et al.]............................... 70 Tragedy of the Commons or Tragedy of the Private Land?, Bai Peng-Peng [et al.] 71 Group size and collective action, Jorge Pe~na[et al.]................. 72 Isochrony and meter convergence in speech as coalition signals, Leona Polyan- skaya [et al.]....................................... 73 The relative contributions of relatedness and kinship to social support in rural Tamil Nadu, Eleanor Power [et al.].......................... 74 Explaining Diversity in Foraging behavior of Children in Pemba Island, Zanz- ibar, Ilaria Pretelli [et al.]............................... 75 Gendered division of labour and childbearing in low-fertility settings., Alyce Ray- bould [et al.]...................................... 76 Cooperation, Conflict and Social Status in a Small-Scale Society, Daniel Red- head [et al.]....................................... 77 Southpaw advantage: left-handed men are over-represented in combat sports and win more fights in two large samples., Thomas Richardson [et al.]......... 78 Why do older people fall in love? Partnership transitions and family relations in later life, Anna Rotkirch [et al.]............................ 79 Husband, Lover, Pater, Genitor: Concurrency and Paternity in Himba Pastoral- ists, Brooke Scelza [et al.]............................... 80 Parent-offspring conflict unlikely to explain `child marriage' in northwestern Tan- zania, Susan Schaffnit [et al.]............................. 81 4 Formal leadership and collective action in two horticulturalist populations in Bo- livia, Edmond Seabright [et al.]............................ 82 No evidence that becoming a grandparent benefits well-being: What does this mean for evolutionary theories of grandparenting?, Paula Sheppard [et al.].... 83 Association between immune system reactivity and facial attractiveness in men, Zanetaˇ Sl´amov´a[et al.]..................................... 84 Grandmothers are crucial for grandchild survival between the first and second year of life in families with low SES, Petr Turecek [et al.]............. 85 How do hunter-gatherers decide to move their camps?, Vivek Venkataraman [et al.] 86 Influence of skin color and a prosocial priming in costly sharing in children from Northeast Brazil, Maria Emilia Yamamoto [et al.].................. 88 The Evolutionary Ecology of Menopause Symptoms, Yuping Yang [et al.].... 89 Evolutionary ecology of non-reproductive monks, Liqiong Zhou [et al.]...... 90 High social status is associated with child health among women, but not men, in an acculturating horticulturalist population, Sarah Alami [et al.]......... 91 Uncertainty about social interactions leads to social heuristics: evidence from a cooperation experiment, Pieter Van Den Berg [et al.]................ 92 She Always Steps in the Same River: Similarity Among Long-Term Partners in Their Demographic, Physical,