A booster of the COVID-19 vaccine targeting the prevailing Omicron variant did not become available in the United States until a year after the variant was first detected. This pattern of developing, testing, and distributing a variant-specific booster may become the default response to further...

Food insecurity and hunger have traditionally been measured by aggregate food supplies or by variables correlated with food insecurity. Because these measures often poorly reflect individuals’ true deprivation, economists have turned to surveys with direct questions about food insecurity....