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| ID | Type | Description | Link |
|---|---|---|---|
| 1RC1HD063370-01 | U.S. NIH Grant/Contract | View source |
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| Name | Class |
|---|---|
| National Institutes of Health (NIH) | NIH |
| Ohio State University | OTHER |
| Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD) | NIH |
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The investigators hypothesize that monetary incentives and messaging, such as making nutritious foods relatively less expensive than less nutritious foods and framing the price difference in a positive or negative way, will influence purchasing behavior of households.
In this study, 239 loyalty card shoppers were recruited at Hannaford grocery stores to participate in a study in which a 10% price difference between nutritious and less nutritious foods was introduced. and then framed as a subsidy, tax, or a combination of a tax and subsidy. To determine whether or not the framing of the price difference influenced purchasing behavior, the difference was framed as a subsidy on nutritious foods, a tax on less nutritious foods, and a combination of a tax and subsidy on less nutritious and nutritious foods, respectively. The purpose of this study was to examine the general impact of this price difference on purchases of nutritious and less nutritious foods, and whether or not the framing of the price difference had a differential effect on behavior.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Price difference | Experimental | Introduce a 10% price difference between foods labeled as nutritious and foods labeled as less nutritious and frame the price difference as either a Subsidy, Tax, or combination of a Tax and Subsidy. |
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| No price difference | No Intervention | No price difference between nutritious and less nutritious foods. |
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Subsidy | Behavioral | Frame the price difference as a 10% subsidy on nutritious food items. |
|
| Measure | Description | Time Frame |
|---|---|---|
| Change in expenditures on nutritious and less nutritious foods | Item level transaction data were collected for each participant between mid-July 2010 and mid-March 2011. These data included expenditures on all items purchased in the store. Average weekly expenditures were generated and reported in Aug 2011. | 8 months |
| Measure | Description | Time Frame |
|---|---|---|
| Change in quantities purchased of nutritious and less nutritious foods | Item level transaction data were collected for each participant between mid-July 2010 and mid-March 2011. These data included quantities of all items purchased in the store. Average weekly quantities purchased were generated and reported in Aug 2011. | 8 months |
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Inclusion Criteria:
Exclusion Criteria:
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| Name | Affiliation | Role |
|---|---|---|
| Brian Wansink, PhD | Cornell University | Study Director |
| David Just, PhD | Cornell University | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| New York City School District | New York | New York | United States |
| PubMed Identifier | Type | Citation | Retractions |
|---|---|---|---|
| 25514158 | Result | Pope L, Hanks AS, Just DR, Wansink B. New Year's res-illusions: food shopping in the new year competes with healthy intentions. PLoS One. 2014 Dec 16;9(12):e110561. doi: 10.1371/journal.pone.0110561. eCollection 2014. |
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| ID | Term |
|---|---|
| D009765 | Obesity |
| D015438 | Health Behavior |
| ID | Term |
|---|---|
| D050177 | Overweight |
| D044343 | Overnutrition |
| D009748 | Nutrition Disorders |
| D009750 | Nutritional and Metabolic Diseases |
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| ID | Term |
|---|---|
| D013660 | Taxes |
| ID | Term |
|---|---|
| D004467 | Economics |
| D004472 | Health Care Economics and Organizations |
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| Tax | Behavioral | Frame the price difference as a 10% tax on less nutritious food items. |
|
| Tax and subsidy | Behavioral | Frame the price difference as a 5% tax on less nutritious food items and a 5% subsidy on nutritious food items, creating a 10% relative price difference between the types of foods. |
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| Change in expenditures on nutritious and less nutritious foods in specific food categories. |
Item level transaction data were collected for each participant between mid-July 2010 and mid-March 2011. These data included expenditures on all items purchased in the store, as well as the specific product type. With this information, product groupings can be created, such as for dairy, candy, and fresh produce. Average weekly expenditures for these groupings were generated and reported in July 2012. |
| 8 months |
| D001835 |
| Body Weight |
| D012816 | Signs and Symptoms |
| D013568 | Pathological Conditions, Signs and Symptoms |
| D001519 | Behavior |