Sourafel Girma

Laws mandating vaccination against Covid-19 as a condition of employment in health and care sectors were commonplace during the pandemic. Using weekly data at the local authority level, we examine the impact of the vaccine mandate for elderly care homes in England on vaccine take-up, staffing levels, and mortality. Our identification strategy involves (1) comparing take-up and staffing in English elderly care homes relative to other social care settings unaffected by the mandate; (2) comparing take-up and staffing in English elderly care homes relative to those in Wales where the mandate also did not apply; and (3) comparing Covid-19 mortality among English elderly care home residents relative to mortality in domestic homes in England and to care homes in Wales. Our results suggest that the mandate substantially decreased the proportion of care home workers who remained unvaccinated (equivalent to between 28,000 and 41,000 fewer unvaccinated staff), but this came at the cost of a reduction in staffing levels of between 3% and 4% (equivalent to 14,000 to 18,000 staff). We observe this effect most strongly in areas of low unemployment. Our results do not provide evidence that the vaccine mandate was successful in its primary aim of reducing care home deaths. Relatively wide confidence intervals mean inferences regarding mortality are more uncertain than for vaccination uptake and staffing. This paper was accepted by Carri W. Chan, healthcare management. Supplemental Material: The data and e-companion are available at https://doi.org/10.1287/mnsc.2023.4832 .

Failure Modes and Effects Analysis (FMEA) is a systematic approach for evaluating failure modes in a system. However, its current implementation in complex systems is marred by high resource requirements, a lack of available data and difficulty of deployment. Consequently, attempts to integrate FMEA with other systematic methodologies have yielded unclear outcomes. Therefore, this paper used a score-based metric and applied the ordered probit model to empirically identify challenges associated with deploying FMEA and these attempts’ impact on FMEA applications as well as the influence of other organisational parameters. Our findings reveal that Fault Tree Analysis and Axiomatic Design methodologies reduced the perceived level of challenge significantly in the investigated sample. Our research outcome is of value to the practitioner community by showing that the level of challenge associated with FMEA deployment appears independent of organisational parameters, and that such a co-adoption of complementary methodologies in complex systems can reduce this challenge.

This paper finds that a greater reliance on foreign market sales increases the volatility of firms’ stock returns, using high‐frequency data for publicly listed Japanese manufacturing firms over the period 2000–10. The two margins of global engagement we consider, namely, exports and sales via foreign affiliates (horizontal foreign direct investment), have both a positive and economically significant effect on firm‐level volatility. We find, however, that increasing the intensity of sales through foreign affiliates has a stronger effect on volatility than a similar change in export intensity. We also uncover evidence consistent with the notion that firms’ need to use external finance to cover the substantial costs involved in reaching foreign consumers can be an important channel through which firms’ participation in international markets increases their exposure to economic uncertainty.