The statistical measures used by the U.S. Department of Agriculture since 1995 to monitor the food security of the Nation’s households—the extent to which they can consistently acquire adequate food for active healthy living—are based on a single-parameter logistic latent-trait measurement...

Higher income households likely spend less per person on whole and canned milk than do lower income households, but more on most other dairy products, according to this technical analysis of the effect of household socioeconomic features on dairy purchases. For example, a 10-percent increase in...