This week’s digest covers public oversight of surveillance, cognitive engagement with AI imagery, maternal vaccine readiness, supply chain digitalisation, formative assessment in algebra, soybean technical efficiency, stock prediction with ChatGPT, flood impacts on firms, virtual influencers, and cost-sharing games.
📊 This week at a glance
🌍 African-led research
A new model helps African citizens oversee government surveillance, drawing on cases where public oversight was attempted.
Duncan and Chiumbu (Journal of Contemporary African Studies, 2025) synthesize lessons from African attempts at public oversight of intelligence-driven digital surveillance. They propose a model rooted in democratic accountability and participatory governance, shifting from the assumption that oversight is solely a state function. For African scholars and activists, this offers a practical framework to demand transparency and protect civil liberties in the digital age.
Older adults engage more with human-written narratives than AI-generated imagery in digital cognitive training.
Lu et al. (International Journal of Human-Computer Interaction, 2025) found that adults aged 59-85 preferred human-written stories, which fostered deeper cognitive and emotional engagement. This suggests that AI-generated visuals may not effectively motivate older users, a key insight for designing digital health interventions. African developers can use this to tailor cognitive tools for aging populations, ensuring cultural and emotional relevance.
A Ugandan pregnancy cohort establishes baseline rates of adverse birth outcomes, informing maternal vaccine trials.
Davies et al. (Vaccine, 2025) report baseline adverse birth outcomes from a prospective cohort in Uganda, using harmonized definitions. This provides essential data for evaluating maternal vaccines in low-income settings, where such baselines are scarce. For African researchers, it enables more accurate assessment of vaccine safety and efficacy, supporting local health policy decisions.
Supply chain digitalisation can increase climate vulnerability when governance capacity is weak.
Imandojemu and Orole (Sustainable Development, 2025) find that digitalised supply chains may amplify climate risks, but strong governance mitigates this. This challenges the assumption that digitalisation automatically builds resilience. For African economies, it underscores the need to strengthen governance alongside digital adoption to avoid unintended climate impacts.
A lightweight platform provides step-by-step feedback in algebra, supporting inclusive classrooms.
Bendourou et al. (Discover Education, 2025) present an interactive tool that guides students through intermediate steps in solving equations, not just final answers. This addresses a gap in digital math tools, offering low-stakes, non-judgmental feedback. For African teachers, it offers an accessible way to differentiate instruction and support diverse learners.
Mozambican soybean farmers operate at about 60% technical efficiency, with significant room to improve yields.
Peace and Popat (Economies, 2025) estimate technical efficiency for 926 smallholder soybean farmers, finding an average score of 0.60. This means farmers could increase output by 40% with existing inputs if they adopted best practices. For agricultural policy, this highlights the potential for extension services and input access to boost productivity without new technology.
🔬 Global breakthroughs
ChatGPT can predict stock price movements from news headlines, outperforming random chance.
Lopez-Lira and Tang (Journal of Financial Economics, 2025) show that ChatGPT’s sentiment analysis of news predicts next-day returns, with a significant positive relationship. This suggests large language models can capture information beyond traditional methods. For African markets, this could offer a low-cost tool for investors, though the study is based on US data and requires validation locally.
Floods persistently damage European firms, reducing assets by up to 5% seven years after the event.
Fatica et al. (Journal of Financial Stability, 2025) find that an average flood reduces firm total assets by 2% the following year, with effects lasting up to seven years. This underscores the long-term economic cost of climate disasters. For African businesses, it highlights the need for resilience planning and insurance to mitigate similar risks.
Virtual influencers shown with human social ties generate higher engagement than those without.
Cascio Rizzo et al. (Journal of the Academy of Marketing Science, 2025) find that virtual influencers appearing in photos with humans boost consumer engagement. This suggests that social presence enhances perceived authenticity. For African marketers, using virtual influencers with human interactions could increase campaign effectiveness, but cultural adaptation is key.
A unified framework shows airport and irrigation cost-sharing games are related, with Shapley value solutions.
Márkus et al. (Central European Journal of Operations Research, 2025) formalize irrigation games and prove they include airport games. They provide a characterization and compute the Shapley value, a fair allocation method. For African infrastructure projects, this offers a mathematical basis for fairly sharing costs of shared facilities like irrigation systems.
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