ERS report compares proprietary household scanner data to nationally representative Government survey data and finds that reported household food-at-home expenditures in commercial scanner data were lower than in two Government surveys. The report details the comparison methodology and describes implications for using the commercial data in food economics research.
Comparing commercial and household scanner data from IRI and government scanner data
Sweitzer, M., Brown, D., Karns, S., Muth, M., Siegel, P., & Zhen, C. (2017). Food-at-home expenditures: Comparing commercial and household scanner data from IRI and government scanner data. Washington, DC: U.S. Department of Agriculture, Economic Research Service.