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Field
Last Published
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Before
July 26, 2023 10:58 AM
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After
September 19, 2023 11:32 AM
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Field
Intervention End Date
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Before
September 30, 2023
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After
October 31, 2023
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Field
Experimental Design (Public)
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Before
This experiment has three broad parts.
Wave-1 action experiment: First, we recruit a sample of Democrats and offer them the opportunity to contact Congress. We randomize these participants between three treatments arms. In A0, participants will choose whether to contact Congress or not with no mention of future participants learning that they did so. In A1, participants are told that if they contact Congress, up to 10 future participants in a particular demographic group will be told that they did so, after those participants decide whether to contact Congress or not. In A2, participants are told that if they contact Congress, up to 10 future participants in a particular demographic group will be told that they did so, before those participants decide whether to contact Congress or not.
WTP experiment: We invite all A0 participants who contacted Congress to take a second survey. In this survey, we show them 20 returning participants who could be paired with them and ask them to choose, for each one, if we should show that participant a basic demographic profile of them and donate $3-$6 to carbon offsets or show them an extended profile saying that they contacted Congress. The returning participants will vary in traits including their political party and whether they would see the profile before or after deciding whether to contact Congress. Participants will also be randomized to make choices with or without information on whether returning participants believe climate change is mostly human-caused.
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After
This experiment has three broad parts.
Wave-1 action experiment: First, we recruit a sample of Democrats and offer them the opportunity to contact Congress. We randomize these participants between three treatments arms. In A0, participants will choose whether to contact Congress or not with no mention of future participants learning that they did so. In A1, participants are told that if they contact Congress, up to 10 future participants in a particular demographic group will be told that they did so, after those participants decide whether to contact Congress or not. In A2, participants are told that if they contact Congress, up to 10 future participants in a particular demographic group will be told that they did so, before those participants decide whether to contact Congress or not.
WTP experiment: We invite all A0 participants who contacted Congress to take a second survey. In this survey, we show them 20 returning participants who could be paired with them and ask them to choose, for each one, if we should show that participant a basic demographic profile of them and donate $3-$6 to carbon offsets or show them an extended profile saying that they contacted Congress. The returning participants will vary in traits including their political party and whether they would see the profile before or after deciding whether to contact Congress. Participants will also be randomized to make choices with or without information on whether returning participants believe climate change is mostly human-caused.
Follow-up WTP experiment: We will run a follow-up of the WTP experiment in which we randomize participants to have the option to hide their own political affiliation from profiles passed on to returning participants. In addition to this WTP experiment, we will also randomize some participants to make choices between letters to Congress (with certainty) and donations to carbon offsets.
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Field
Planned Number of Observations
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Before
-8,200 participants in the Wave-1 action experiment (may recruit more to achieve the required sample size for the WTP sub-experiment)
-1,140 participants in the WTP sub-experiment
-4,500 liberal participants in the Wave-2 action experiment
-3,250-4,500 conservative participants in the Wave-2 action experiment (pre-registered to vary based on control mean among first 500 participants)
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After
-8,200 participants in the Wave-1 action experiment (may recruit more to achieve the required sample size for the WTP sub-experiment)
-1,140 participants in the WTP sub-experiment
-4,500 liberal participants in the Wave-2 action experiment
-3,250-4,500 conservative participants in the Wave-2 action experiment (pre-registered to vary based on control mean among first 500 participants)
In the follow-up experimentsL
-1,000 participants in the follow-up WTP experiment
-550 participants in the follow-up letter-certainty experiment
-200 to 300 participants in the qualitative motivating survey
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Field
Sample size (or number of clusters) by treatment arms
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Before
Among 8,200 (or more) participants in the Wave-1 action experiment:
-3,400 participants in A0 group (half paired with liberal and half paired with conservative future participants). Note that we may increase the size of this group to recruit the pre-registered sample size for the WTP sub-experiment.
-2,400 participants in A1 group (half paired with liberal and half paired with conservative future participants)
-2,400 participants in A2 group (half paired with liberal and half paired with conservative future participants)
Among 1140 participants in WTP sub-experiment:
-660 participants in the variation with information on climate beliefs
-480 participants in the variation without this information
Among 4,500 liberals in the Wave-2 action experiment:
-2,250 participants in the group without invitations (B0)
-2,250 participants in the group with invitations (B1)
Likewise, the 3,250-4,500 conservative participants in the Wave-2 action experiment will be split evenly between seeing and not seeing an invitation to act from an earlier participant.
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After
Among 8,200 (or more) participants in the Wave-1 action experiment:
-3,400 participants in A0 group (half paired with liberal and half paired with conservative future participants). Note that we may increase the size of this group to recruit the pre-registered sample size for the WTP sub-experiment.
-2,400 participants in A1 group (half paired with liberal and half paired with conservative future participants)
-2,400 participants in A2 group (half paired with liberal and half paired with conservative future participants)
Among 1140 participants in WTP sub-experiment:
-660 participants in the variation with information on climate beliefs
-480 participants in the variation without this information
Among 4,500 liberals in the Wave-2 action experiment:
-2,250 participants in the group without invitations (B0)
-2,250 participants in the group with invitations (B1)
Likewise, the 3,250-4,500 conservative participants in the Wave-2 action experiment will be split evenly between seeing and not seeing an invitation to act from an earlier participant.
Among 1000 participants in the follow-up WTP experiment:
-500 participants who pass on profiles including their own political affiliation
-500 participants who can choose whether to include their own political affiliation in each profile
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