During his life, Friedrich Hayek drastically changed his evaluation of Aristotle’s role in the history of political and economic thought. Initially considering Aristotle as one of the forerunners of the liberal tradition, he then came to consider Aristotle’s philosophy as the source of collectivist thought. By examining both published and unpublished materials, this article shows that Hayek’s attack on Aristotle in The Fatal Conceit is authentic and puts Hayek’s affirmations on Aristotle in the context of his intellectual development. Hayek’s rejection of Aristotle can be related to his increasing emphasis on the abstract nature of the rules governing complex phenomena. However, this does not explain why Hayek felt compelled to take such a stance on an ancient philosopher who was highly esteemed in the school he belonged to. Hayek’s abandonment of the established view on the Aristotelian roots of the Austrian school can be better understood by considering the intellectual environment of his time. His eventual adoption of Karl Popper’s point of view on Aristotle meant taking a stance against Karl Polanyi’s democratic socialism and distancing himself from Wilhelm Röpke’s Catholic conservatism.

A tantalizing open problem, posed independently by Stiebitz in 1995 and by Alon in 1996 and again in 2006, asks whether for every pair of integers $s,t \ge 1$ there exists a finite number $F(s,t)$ such that the vertex set of every digraph of minimum out-degree at least $F(s,t)$ can be partitioned into non-empty parts $A$ and $B$ such that the subdigraphs induced on $A$ and $B$ have minimum out-degree at least $s$ and $t$, respectively.

In this short note, we prove that if $F(2,2)$ exists, then all the numbers $F(s,t)$ with $s,t\ge 1$ exist and satisfy $F(s,t)=\Theta (s+t)$. In consequence, the problem of Alon and Stiebitz reduces to the case $s=t=2$. Moreover, the numbers $F(s,t)$ with $s,t \ge 2$ either all exist and grow linearly, or all of them do not exist.

The article pioneers the examination of “hustle kingdoms”: illegal cybercrime training academies in West Africa. It explores these entities as innovative and adaptive institutions that emerge in response to systemic socio-economic strain. This article provides a unique analysis of hustle kingdoms by situating their emergence within the region’s socio-economic, cultural and technological trajectories. It does so by assessing the contemporary manifestation of these cybercrime academies with history in mind to understand the past that created them. It highlights how these cybercrime training academies have evolved from earlier forms, thereby showcasing a unique form of deviant innovation. It contributes to existing literature by addressing the critical gap in the scholarly discourse surrounding these entities and their historical evolution. Drawing on Merton’s strain theory, this historical scholarly endeavour examines how systemic barriers to education and employment have fostered deviant innovation, transforming hustle kingdoms from early fraud enterprises into sophisticated, global cybercrime networks. The analysis highlights the structural disparities that sustain their operations by juxtaposing these academies with conventional educational frameworks. The findings offer novel insights into the intersection of inequality, cultural narratives and technological adaptation, positioning hustle kingdoms as both products and catalysts of systemic strain.

Artificial sweeteners are used to reduce energy intake, but studies suggest that consumption during pregnancy may impact the offspring’s risk of overweight. In this longitudinal cohort study, we aimed to examine the association between consumption of artificially sweetened or sugar-sweetened beverages during pregnancy and offspring overweight from birth to 18 years in the Danish National Birth Cohort. A total of 101 042 pregnancies were enrolled in the Danish National Birth Cohort from 1996 to 2002. Follow-up was conducted throughout pregnancy, childhood and adolescence. Additionally, 72 821 women completed an FFQ during pregnancy, reporting intake of beverages sweetened with artificial sweeteners or sugar. Offspring height and weight were obtained during childhood and adolescence. Multivariate logistic regression was performed to estimate the OR for overweight concerning maternal beverage consumption. Analyses were adjusted for risk factors for childhood overweight, including maternal age, pre-pregnancy BMI, physical activity and smoking in pregnancy, healthy eating index, paternal BMI, socio-economic status and duration of breastfeeding. We found increased odds of overweight in 7-, 11-, 14- and 18-year-old offspring whose mothers reported drinking ≥ 1 artificially sweetened beverage daily during pregnancy compared with no consumption (18 years: adjusted OR 1·26 (95 % CI 1·12, 1·42)). We found decreased adjusted odds of overweight in 11- and 18-year-old offspring whose mothers reported drinking ≥ 1 sugar-sweetened beverage daily during pregnancy compared with no consumption. We found that consumption of artificially sweetened beverages during pregnancy was associated with an increased risk of overweight in childhood and adolescence after adjustment for risk factors for childhood overweight.

We establish two new truncated identities for theta series. Their partition-theoretic interpretations are also given.

Detrimental impacts of early ecological adversity on children’s development are known, but our understanding of their mechanisms and factors contributing to multifinality of developmental trajectories triggered by adversity is incomplete. We examined longitudinal pathways from ecological adversity parents experienced when children were infants, measured as a cumulative index of fine-grained scores on several ecological risks, to children’s future self-regulation (SR) in 200 U.S. Midwestern community families (96 girls). Parents’ observed power-assertive styles were modeled as mediators, and their negative internal working models (IWMs) of the child, coded from interviews – as moderators. Both were assessed twice, at 16 months and at 3 years, to inform our understanding of their developmental timing. Children’s SR was reported by parents and observed at 4.5 years. Path analyses revealed moderated mediation in mother-child relationships: A path from higher early ecological adversity to elevated power assertion to children’s poorer SR was significant only for mothers with highly negative IWMs of the child. Maternal negative IWMs assessed early, at 16 months, moderated the link between ecological adversity and power assertion. Once elevated, maternal power assertion was stable through age 3 and not moderated by IWM at age 3. There were no significant effects in father-child relationships.

This History of Education Society Presidential Address considers Blackfoot education and how psychologist Abraham Maslow attempted to make sense of it after his six-week stay at the Siksika reserve in 1938. Maslow encountered an educated, secure people at Siksika, who had a fully formed system of education grounded in reverence for children, stories, ceremonies, songs, language, humor, land, and connection, all of which had been tested over millennia. Though he might not have been able to interpret what he was seeing and hearing as fully as would a member of the Blackfoot community, what he experienced stuck with him, and can be read as the basis for the theories he presented as the hierarchy of needs and self-actualization. As Maslow learned, Blackfoot history is an education history, which Blackfoot Elders sought to document and keep for generations not yet born.

Aphis gossypii Glover (Hemiptera: Aphididae) is a significant pest of Capsicum annuum (Solanales: Solanaceae) and exhibits intraspecific differentiation within populations. To investigate the adaptability of Hap3 and Hap17 A. gossypii to various C. annuum varieties, including ‘Lvzhou101’ (LZ), ‘Lashen’ (LA), ‘Saierweilvtianjiao’ (SE), ‘Haimaihongri’ (HM), ‘Chaotianjiao’ (CT), and ‘Luosijiangjun’ (LS), we employed life tables to analyse growth and population parameters post-feeding and conducted petri dish host choice experiments to assess the host plant preference of A. gossypii. Survival rates of A. gossypii varied significantly across C. annuum varieties. Notably, Hap3 and Hap17 thrived on ‘LZ’ but failed to establish populations on ‘LA’. The net reproductive rate (R0), average generation time (T), and intrinsic rate of increase (rm) differed markedly between Hap3 and Hap17 across C. annuum varieties. Feeding on ‘LZ’ resulted in a significantly higher R0 value (26.49) for Hap3 relative to other varieties. The T (7.60 days) and rm (0.27) values for Hap3 on ‘SE’ were superior to those observed on other C. annuum varieties. These findings indicate that ‘SE’ is the optimal host for Hap3 growth, while ‘LZ’ best supports Hap17. Both haplotypes exhibited the lowest adaptability to ‘LA’. Therefore, the utilisation capacity of A. gossypii populations on C. annuum demonstrates differentiation, and the resistance levels among C. annuum varieties to A. gossypii vary. This differentiation can inform targeted management strategies for aphid infestations on pepper crops.

We use data on Latino children in the United States who have been randomly assigned calculation tests in English or Spanish to check for the so-called bilingual advantage, the notion that knowing more than one language improves individuals’ other cognitive skills. After controlling for different characteristics of children and their parents, as well as children's time in the US, we find a bilingual advantage among children who read or write in English and Spanish but not for those who only speak or understand both languages. In particular, bilingual readers or writers perform one-fourth to one-third of a standard deviation better than monolingual children, equal to learning gains of an additional school year. Applying the Oster test, we find that selection on unobservables would need to be 3–4 times stronger than selection on observables to explain away our results. The bilingual advantage is stronger among children in two-parent households with siblings and for those at the upper end of the ability distribution.

We present an agent-based model to study how the structure of a scientific network could affect the public uptake of science and how this impact is influenced by scientific uncertainty and affinity bias. For unbiased agents, a highly connected scientific network decreases the probability that the public favors the correct theory. For biased agents, however, a moderately connected scientific network causes the public to favor the correct theory more often. This results from the competition between the scarcity of information (for poorly connected agents) and the spread of misleading information (for highly connected agents). Adding more scientists strengthens both effects.

Three popular objections to reductionism about color, experience as of impossible colors, the unary/binary distinction, and structural mismatch, are issues just, I argue, for the (probably default) version of reductionism according to which colors reduce to sets of surface spectral reflectances. They are not problems for the version on which colors are dispositions to reflect coarse-grained intensities of light are—what in colorimetry are called “object colors.” This article sets out to demonstrate the virtues of the latter reductionism.

This article defends informed preference satisfaction theories of welfare against the most influential objections put forward in the economic and philosophy of science literatures. The article explicates and addresses in turn: the objection from inner rational agents; the objection from unfeasible preference reconstruction; the objection from dubious normative commitments; the objection from conceptual ambiguity; and the objection from conceptual replacement. My defence does not exclude that preference satisfaction theories of welfare face significant conceptual and practical challenges. Still, if correct, it demonstrates that philosophers/welfare economists are justified in relying on specific versions of such theories, namely informed preference satisfaction theories.

Total anomalous pulmonary venous return is a rare CHD that may present in the neonatal period with signs of congestive cardiac failure. First-line treatment is corrective surgery in the first months of life. The authors report the case of a 2-month-old infant with non-obstructive total anomalous pulmonary venous return submitted to a two-stage hybrid repair, involving cardiac surgery and interventional cardiology.

This case report discusses a 1-year-old female with severe growth retardation and multiple congenital anomalies, including a large patent ductus arteriosus and interrupted inferior vena cava. Successful percutaneous patent ductus arteriosus closure was achieved via the azygos venous route, overcoming anatomical challenges and highlighting the importance of individualized procedural strategies in complex cases.