City, University of London

Optimal Sharpe Ratio Portfolios and the Role of Perfect Foresight in Returns, Volatilities, and Correlations

Using 50 years of monthly data on the 1,000 largest US equities, this article examines the relative importance of security selection, volatility, and correlations in determining portfolio efficiency. We introduce the Optimal Sharpe Ratio (OSR) portfolio, a boundary-condition fram...

When does mental well-being matter for entrepreneurial income? The role of external objective resources from social contexts

Entrepreneurs’ mental well-being has increasingly captured the attention of both scholars and the broader public. Building on self-efficacy theory and conservation of resources (COR) theory, we examine how entrepreneurs’ mental well-being influences their income. We theorize that...

The dimensions and realization mechanism of brand Jing-Jie(境界) initiated by brand ritual behaviours: a grounded analysis inspired by Chinese Zen Jing-Jie(境界) theory

Purpose This research seeks to explain the phenomenon of consumers' internal growth initiated by brand ritual behaviours, by establishing a novel construct “brand Jing-Jie(境界)”, inspired by Chinese Zen Jing-Jie(境界)theory. The connotation of “brand Jing-Jie(境界)” is a supplem...

Assimilating generative AI into ideation work: seeding, search and human contribution

Purpose This paper examines how generative AI (GenAI) systems can be assimilated into idea generation (ideation) work so that human–GenAI collaboration augments creativity. It asks which seeding configurations with GenAI improve novelty, utility and feasibility, and examines prel...

Risk sharing with lambda value-at-risk under heterogeneous beliefs

Abstract In this paper, we study the risk sharing problem among multiple agents using lambda value-at-risk as their preference functional, under heterogeneous beliefs, where each agent’s belief is represented by a probability measure. We obtain semi-explicit formulas for the inf-...

Developing management theory from sports: insights from association football

Purpose This paper explores how research on association football (also referred to as “soccer” in the USA) published in leading management and strategy journals contributes to the advancement of general management theory. By leveraging football as a viable field of scholarly inve...

Natural Products and Neuroregeneration: Rethinking Discovery Beyond Bioavailability Through Pseudo-Natural Product Design

Natural product (NP)-based neuroregeneration research has generated extensive preclinical evidence over the past five decades. Pharmacological activity across core processes of central nervous system (CNS) repair including neurogenesis, axonal regeneration, and neuroplasticity ha...

Modular dissertation pathways in undergraduate economics: A case study of curriculum innovation

This paper presents a case study of curriculum innovation in undergraduate economics education at a UK Russell Group university. A modular dissertation structure was introduced to address uneven econometric preparation, rising supervision pressures, and increasingly diverse stude...

Robust optimisation of RC bridge seismic design considering ground motion suite variability

Robust design optimisation (RDO) of performance-based seismic design (PBSD) has been established as a rigorous approach for obtaining optimal solutions that are minimally sensitive to record-to-record (RTR) variability of ground motions used in nonlinear response history analysis...

Turning social concerns into entrepreneurial intentions: unpacking the role of social entrepreneurship in emerging economies

Purpose This study examines how social entrepreneurship influences social entrepreneurial intentions among university students in a developing economy. It explores the sequential mediating roles of entrepreneurial attitude and entrepreneurial motivation, as well as the moderating...

Reducing Emotional Burden Carried by Neurodivergent Students in School: Perspectives From Students and School Staff

Abstract Purpose Compared to neurotypical peers, neurodivergent students experience increased exposure and more intense responses to commonly upsetting events (emotional burden), contributing to poor mental health. Student and staff perspectives offer insights into sources of emo...

Social Capital and Willingness to Pay for Community-based Health Insurance in Rural Communities of Delta State, Nigeria

Abstract Background: The amount of social capital in a community can be an asset for the breakthrough and sustainability of community-based health insurance (CBHI), thereby contributing to the demand for it at the community level. Aims: This study aimed to assess the relationship...

Effects of Morning and Evening Narrowband Blue Light and Myopic Defocus on Axial Length in Humans

Purpose To investigate the effects of morning and evening narrowband blue light exposure on axial length, and to examine the short-term effect of morning blue light combined with myopic defocus on axial length.Methods For objective 1, 18 individuals underwent 60 minutes of narrow...