Improving Data to Analyze Food and Nutrition Policies (2005) / Chapter Skim
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3 Proprietary Data Sources
3 Proprietary Data Sources
Pages 53-62
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From page 53... ...
SCANNER DATA Scanner data come from two types of data collections: (1) point-of-sale (retail)
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From page 54... ...
To consider this figure in context, the study indicated that the National Survey of Food Stamp Program Participants in 1996 cost $1.7 million. Purchase of the necessary scanner data for applications that required many months or years of observations for many outlets could, of course, entail substantial costs.
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From page 55... ...
· Size -- Education · Mass · Universal -- Employment Merchandiser Product Code -- Occupation -- Target, (UPC) -- Marital Status Value City, · UPC Description -- Race Wal-Mart, etc.
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From page 56... ...
Scanner data have been used for policyrelevant food and nutrition research, such as studying the effects of mandatory nutrition labeling (Mathios, 1998, 2000) and the redemption activity of food stamp and cash assistance clients in conjunction with the Maryland demonstration project on electronic benefit transfer (Cole, 1997)
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From page 57... ...
Another key attribute of these data is that they are produced in a timely manner, unlike those from federal surveys. Furthermore, the household scanner panel samples are much larger than those for the Consumer Expenditure Survey (CE)
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From page 58... ...
Although data on employment status, total household income, and vehicle ownership are collected, information about assets, sources of income, and participation in food assistance programs is not collected. One general limitation of point-of-sale scanner data and household scanner data is that the UPCs do not always clearly identify items.
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From page 59... ...
Specifically, the retail scanner datasets could be used to examine shortrun and long-run aggregate market trends. They could also be used to compare aggregate totals on food purchases with other sources of data on food expenditures -- for example, from the CE survey and from the national food disappearance data, which measures the flow of raw and semiprocessed foods through the U.S.
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From page 60... ...
If information on participation in food assistance programs (for example, food stamps, WIC, school breakfast and lunch) could be added to household scanner data, the augmented datasets could be used to track and compare expenditures of food assistance program recipients and of nonrecipients with similar incomes.
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From page 61... ...
It might also be useful for estimating consumption of foods that are eaten less regularly, which may be critical for certain food safety risk assessments. Information about preparation of food and ingredients used could also be used in food safety risk assessments.
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From page 62... ...
62 IMPROVING DATA TO ANALYZE FOOD AND NUTRITION POLICIES Of greatest concern with the NET data is the quality of data collected through the 14 days of dietary recalls. Since this amount of recall places significant time and recall burdens on respondents, the quality of the data may suffer.
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