Consumers are venting frustrations about health insurance in wake of UnitedHealthcare CEO murder. Costs have outpaced inflation for years.

Older people revealed their biggest regrets to give perspective to the younger generation. The list includes choosing a mate too quickly and worrying too much.

We also establish new classification regret bounds in general for multi-class proper scoring rules and, as applications, provide simple meaningful regret bounds for two specific sets of proper scoring ...