Are refugees more likely to commit crime?

The known unknowns of Ebola in the Democratic Republic of the Congo

May 30, 20268 minSummary

In this episode, Tim Harford investigates the challenges of tracking a significant Ebola outbreak in the Democratic Republic of the Congo. The discussion centers on why official reports often fail to capture the true scale of an epidemic, particularly when dealing with rare virus species in regions affected by conflict and limited infrastructure. Harford is joined by infectious disease epidemiologist Dr. Ruth McCabe, who explains the complexities of disease modeling. The conversation explores how researchers work backward from known mortality rates and previous outbreak data to estimate the actual number of infections. Dr. McCabe highlights the "known unknowns," such as the delay between infection and reporting, the difficulty of identifying undocumented cases, and the impact of cross-border travel on spread. By analyzing data from neighboring countries and past outbreaks, scientists can generate estimates that are crucial for determining the necessary humanitarian response, including hospital capacity, staffing needs, and resource allocation. Ultimately, the episode provides a fascinating look at how mathematical modeling helps experts navigate uncertainty during a rapidly evolving public health crisis, reminding listeners that data interpretation is as critical as the data collection itself.

Does a fall in the UK's healthy life expectancy mean what you think it means?

May 27, 202628 minSummary

In this episode, the team investigates the nuances behind recent headlines claiming a two-year decline in UK healthy life expectancy. By speaking with actuaries and data experts, the hosts clarify that this figure is derived from subjective, self-reported survey data rather than clinical medical records. They explain that the decline is heavily influenced by how different generations perceive and report mental health, rather than an actual deterioration in physical health. The discussion highlights that while this statistic can be a useful, broad-brush measure of public wellbeing, it is often misleading if taken at face value. The episode also tackles the ballooning costs of the HS2 high-speed rail project, examining how initial estimates escalated from 32 billion to over 100 billion pounds due to poor early planning, complex democratic processes, and shifting contractual risks. Finally, the team looks at the economic reality behind temporary VAT cuts on summer attractions. Using historical evidence, they explain why such targeted tax breaks are rarely passed on to consumers as price reductions, suggesting that the benefits often remain with the businesses rather than the public.