With its portable, storable, and zero-emission features, hydrogen energy is regarded as one of the most promising alternative energies for the next generation. Along with developing hydrogen technology applications, Japan's pilot experiments have demonstrated the feasibility of a hydrogen...

With its portable, storable, and zero-emission features, hydrogen energy is regarded as one of the most promising alternative energies for the next generation. Along with developing hydrogen technology applications, Japan's pilot experiments have demonstrated the feasibility of a hydrogen...

Affine mortality models are well suited for theoretical and practical application in pricing and risk management of mortality risk. They produce consistent, closed-form stochastic survival curves allowing for the efficient valuation of mortality-linked claims. We model USA age-cohort mortality...

Affine mortality models are well suited for theoretical and practical application in pricing and risk management of mortality risk. They produce consistent, closed-form stochastic survival curves allowing for the efficient valuation of mortality-linked claims. We model USA age-cohort mortality...

Motivated by the poor performance of cross-validation in settings where data are scarce, we propose a novel estimator of the out-of-sample performance of a policy in data-driven optimization. Our approach exploits the optimization problem's sensitivity analysis to estimate the gradient of the...

The global COVID-19 pandemic has substantially changed the structure of the economy from the pattern of a supply chain system driven by massive production and consumption to effectual demand through information and communication technology (ICT). Moreover, the transition of work style based on...