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Field
Sample size (or number of clusters) by treatment arms
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Before
Pre-policy: 375 in each of 3 treatment groups, 375 in control group
Post-policy: 500 in each of 3 treatment groups, 500 in control group
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After
400 in each of two treatment groups, 400 in control group
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Field
Intervention (Hidden)
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Before
In the pre-policy survey, there will be an information intervention. All respondents will be asked a set of questions to assess their outlook on congestion pricing. They will be asked whether they support or oppose the policy, whether they think the policy is "fair," whether they think the policy will reduce pollution, etc. They will also be asked three specific questions about what they expect to happen with congestion pricing: (1) Predict the effect of congestion pricing on traffic, (2) Predict the effect of congestion pricing on public transit usage, and (3) How will revenue from congestion pricing be used. After this, respondents will be split into 4 groups: 3 treatment groups and 1 control group. The control group be taken immediately to the endline survey. Each treatment group will be provided information corresponding to one of the 3 questions listed above. After receiving this information, they will be asked again about their support, assessment of fairness, etc.
In the post-policy period, the goal will be to assess the effect of the policy on respondents' beliefs/support for the policy. This will likely include an information intervention in a similar vein to the pre-policy information intervention, with the information treatment updated based on the actual effects of the policy.
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After
In the pre-policy survey, there will be an information intervention. All respondents will be asked a set of questions to assess their outlook on congestion pricing. They will be asked whether they support or oppose the policy, whether they think the policy is "fair," whether they think the policy will reduce pollution, etc. They will also be asked three specific questions about what they expect to happen with congestion pricing: (1) Predict the effect of congestion pricing on traffic, (2) Predict the effect of congestion pricing on public transit usage, and (3) How will revenue from congestion pricing be used. After this, respondents will be split into 4 groups: 3 treatment groups and 1 control group. The control group be taken immediately to the endline survey. Each treatment group will be provided information corresponding to one of the 3 questions listed above. After receiving this information, they will be asked again about their support, assessment of fairness, etc.
In the post-policy period, the goal will be to assess the effect of the policy on respondents' beliefs/support for the policy. This will likely include an information intervention in a similar vein to the pre-policy information intervention, with the information treatment updated based on the actual effects of the policy.
UPDATE JANUARY 2025:
The description above is for the information intervention that was implemented in the first survey in this study, which was implemented in May 2024, before the introduction of congestion pricing in New York City. The final survey, which will be conducted after congestion pricing has been introduced, will include an information intervention with the following structure: Respondents will be shown maps of 2 different driving routes in New York City and asked to say whether they think the average driving time along those routes increased, decreased, or stayed the same after congestion pricing was introduced compared to before. (Route 1 goes along the Holland Tunnel, starting in New Jersey and ending in Manhattan. Route 2 starts in the Bronx and ends in East Harlem.) Respondents will then be randomly sorted into one of 3 groups: 2 treatment groups and 1 control group. Respondents in the treatment groups will be shown a chart comparing driving times before and after congestion pricing for one of the 2 driving routes previously shown. The charts will come from the website congestion-pricing-tracker.com.
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