In the United States, the sample is determined by Consumer Expenditure Surveys conducted by the Bureau of Labor Statistics. The price collection is conducted by data collectors on a monthly basis, and is processed further by commodity specialists.
Examples of categories included in the basket are:
- Food and Beverages (breakfast cereal, milk, coffee, chicken, wine, full service meals, snacks)
- Housing (rent of primary residence, owners' equivalent rent, fuel oil, bedroom furniture)
- Apparel (men's shirts and sweaters, women's dresses, jewelry)
- Transportation (new vehicles, airline fares, gasoline, motor vehicle insurance)
- Medical Care (prescription drugs and medical supplies, physicians' services, eyeglasses and eye care, hospital services)
- Recreation (televisions, toys, pets and pet products, sports equipment, admissions)
- Education and Communication (college tuition, postage, telephone services, computer software and accessories)
- Other goods and Services (tobacco and smoking products, haircuts and other personal services, funeral expenses)
- Market basket analysis - a distinct concept in data mining involving the analysis of items frequently purchased together.