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Field	Before	After
Last Published	February 11, 2021 11:59 AM	February 12, 2021 09:49 AM
Intervention (Public)	There are two roles in the experimental task: tourist and guide. The main intervention is whether I reveal a tourist's depression or anxiety symptoms to the guide, when the tourist in fact has these symptoms). Additional, I randomize whether I reveal that a tourist lacks these symptoms, when they do not in fact have them. A secondary intervention is whether, when choosing roles in the task, participants are told (truthfully) that information on these same symptoms might be revealed to their coworker if they choose one of the roles. I also randomize what other demographic information alongside mental health is revealed, and match guides and tourists	There are two roles in the experimental task: tourist and guide. The main intervention is whether I reveal a tourist's depression or anxiety symptoms to the guide, when the tourist in fact has these symptoms). Additional, I randomize whether I reveal that a tourist lacks these symptoms, when they do not in fact have them. A secondary intervention is whether, when choosing roles in the task, participants are told (truthfully) that information on these same symptoms might be revealed to their coworker if they choose one of the roles. I also randomize what other demographic information alongside mental health is revealed. Guides and tourists are also matched on a first-come first-serve basis as they enter the study, so this is quasi-random in that sense.
Intervention Start Date	February 11, 2021	February 15, 2021
Planned Number of Clusters	~770 pairings of participants. There will be 700 participants, who are twice (once at the start of each batch) put into 350 pairs of two, making 700 initial pair-ups. In some of these pair-ups the WTP elicitation mechanism will be implemented and this may lead to the guide and tourist rematching, likely in about 10% of cases (this depends on guides' answers in the mechanism). This implies I will observe about 770 different pairings of participants.	~880 pairings of participants. There will be 800 participants, who are twice (once at the start of each batch) put into 400 pairs of two, making 800 initial pair-ups. In some of these pair-ups the WTP elicitation mechanism will be implemented and this may lead to the guide and tourist rematching, likely in about 10% of cases (this depends on guides' answers in the mechanism). This implies I will observe about 880 different pairings of participants.
Planned Number of Observations	1400 rounds of the task (each person plays two rounds per batch).	1600 rounds of the task (each person plays two rounds per batch).
Sample size (or number of clusters) by treatment arms	I will recruit participants and assign them to roles such that about 448 (64%) of the pairs have tourists with depression or anxiety symptoms. In 50% of the pairs I will reveal this information to the guide. This gives: - ~224 pairs in which the tourist has depression or anxiety symptoms and this is revealed (main treatment) - ~224 pairs in which the tourist has depression or anxiety symptoms and this is not revealed (main control) - ~126 pairs in which the tourist does not have depression or anxiety symptoms and this is revealed - ~126 pairs in which the tourist does not have depression or anxiety symptoms and this is not revealed	I will recruit participants and assign them to roles such that about 512 (64%) of the pairs have tourists with depression or anxiety symptoms. In 50% of the pairs I will reveal this information to the guide. This gives: - ~256 pairs in which the tourist has depression or anxiety symptoms and this is revealed (main treatment) - ~256 pairs in which the tourist has depression or anxiety symptoms and this is not revealed (main control) - ~144 pairs in which the tourist does not have depression or anxiety symptoms and this is revealed - ~144 pairs in which the tourist does not have depression or anxiety symptoms and this is not revealed