Do Taxes Reduce the Purchasing of Soda?
Do Taxes Reduce the Purchasing of Soda?
The study will take place at a cafe managed by university dining services and is located in a
 university building adjacent to the psychology building. The cafe sells sugar-sweetened
 beverages and a variety of diet drinks. The campus dining services and the manager of the
 cafe have given investigators permission to "tax" their sugar sweetened beverages and will
 provide their sales data for a 12 week period.

 The investigators will introduce four arms to the experiment. One arm will be baseline data
 where business 'as usual' will be conducted and no price increases will be implemented on
 SSBs. In the general tax condition the investigators will introduce a 3 cent/ounce tax on the
 five SSB flavors the café offers. In the Pre-K tax condition the investigators will institute
 a 3 cent/ounce tax but will label the tax as proceeds going to Pre-K education. This is
 designed after the Philadelphia tax that was recently passed where funds were earmarked to
 benefit childhood education. In the childhood healthy eating program condition the
 investigators will institute a 3 cent/ounce tax but will label the tax as proceeds going
 toward childhood healthy eating programs. In all tax conditions the firm will keep the
 proceeds, but the research team will make a donation to a Pre-K education non-profit and a
 childhood healthy eating non-profit of the amount generated by the tax during the study
 period.

 Each experimental arm will run for 3 weeks total (for a total study period of 12 weeks). The
 conditions will alternate by week (i.e., week 1: business as usual; week 2: general tax; week
 3: pre-K tax; week 4: childhood healthy eating tax; week 5: business as usual, etc). A
 research assistant will visit the café each week to make any necessary changes to signs that
 will label the drinks.

 The investigators will change the signage of the drinks in the cooler during the study
 period. For the baseline period there will be no changes to the signs made. Currently all
 beverages are labeled with their name and cost (e.g., Pepsi, $1.89). In the tax conditions
 the investigators will change the price of the drink (3 cents/ounce) and add a line notifying
 consumers of the soda 'surcharge' (note "surcharge" will be used in the study because no tax
 was actually passed by the local government). An example of this sign would be 'Pepsi, $2.29,
 includes 40 cent sugary drink surcharge.' In the Pre-K tax condition an added line will say,
 "Pepsi, $2.29, includes a 40 cent sugar sweetened beverage surcharge. Proceeds benefit Pre-K
 education." In the childhood healthy eating programs condition the text will say, "Pepsi,
 $2.29, includes a 40 cent sugary drink surcharge. Proceeds benefit Childhood Healthy Eating
 programs."
Diet-related diseases, such as diabetes and obesity, have become pervasive global health
 challenges, so much so that they are being called epidemics. The problem is particularly
 acute in the United States where two-thirds of adults and one-third of children are
 overweight or obese. A key contributor to increased dietary intake is the increased
 consumption of sugar-sweetened beverages.

 Sugar-sweetened beverages (SSBs), also known as soft drinks, are beverages that are sweetened
 with sugar, high fructose corn syrup, or any other caloric sweetener; this excludes
 noncaloric (diet) drinks. The average American consumes approximately 47 gallons of SSBs per
 year. Americans consume about 278 calories more each day than they did 30 years ago and
 nearly half of this increase is attributable to increased consumption of SSBs. The
 consumption of SSBs has been cited as a key contributor to obesity and has been linked to
 other negative health problems, such as diabetes, heart disease, and dental cavities.
 Therefore, the increase in SSB consumption and the concurrent increase in diet-related
 diseases pose significant direct and indirect costs to society.

 In response to these problems, health experts, laypeople and legislators alike advocate
 policies to reduce the consumption of SSBs. Several municipalities and states have proposed
 policies such as taxes, warning labels, and calorie labeling and a few have passed such
 policies. For example, Berkeley, CA recently adopted a SSB excise tax which charges an
 additional cent for each ounce of SSB sold. In June 2016, Philadelphia passed a 1.5 cent per
 ounce tax on sugary drinks and diet sodas.

 The investigators believe it is critical to further test the effectiveness of taxes in the
 field. In this study, the investigators conduct a field experiment that tests different
 framing of taxes, namely whether the money is earmarked for a particular cause.
Inclusion Criteria:

 -  All patrons who purchase a beverage at our study site (retail cafe) during the
 intervention are eligible for inclusion. The cafe is open to the public, though it
 primarily serves staff, patients and guests of the research labs in the building.

 Exclusion Criteria:

 -  There are no exclusion criteria.