| Field | Before | After |
|---|---|---|
| Field Study Withdrawn | Before | After No |
| Field Intervention Completion Date | Before | After November 16, 2021 |
| Field Data Collection Complete | Before | After Yes |
| Field Final Sample Size: Number of Clusters (Unit of Randomization) | Before | After 1066 subjects |
| Field Was attrition correlated with treatment status? | Before | After No |
| Field Final Sample Size: Total Number of Observations | Before | After 1066 subjects |
| Field Final Sample Size (or Number of Clusters) by Treatment Arms | Before | After 176 full compliance, 167 top 3 choice, 289 random assign, 233 top 3 choice (no select), 201 assigned (no rank) |
| Field Is there a restricted access data set available on request? | Before | After Yes |
| Field Restricted Data Contact | Before | After [email protected] |
| Field Program Files | Before | After No |
| Field Data Collection Completion Date | Before | After November 16, 2021 |
| Field Is data available for public use? | Before | After No |
| Field | Before | After |
|---|---|---|
| Field Paper Abstract | Before | After Rational information acquisition theory predicts people select the information that is more informative, thus people's beliefs will be more persuaded by the information they select. We test the prediction in a critical real-world context---information about COVID-19 vaccines. We conduct an online experiment in Taiwan where the subjects select information about COVID-19 vaccines, and then the subjects update their beliefs about the vaccine effectiveness and preferences of vaccines. As our design distinguishes different stages of the rational acquisition framework, it allows us to diagnose the underlying mechanism of the theory. Our empirical findings demonstrate evidence that people's information acquisition generally coheres with the rational theory framework predictions, that is, people choose information when the information is more likely to alter their decisions. We show that our subjects' beliefs change more when they see the information they select. We also find evidence of change in vaccine choices after they receive the information they select, which further suggests that the subjects follow the rational information acquisition framework. |
| Field Paper Citation | Before | After Lin, ChienHsun, Hans H. Tung. (2023) The self-selection of information and the belief update: An experiment on COVID-19 vaccine information. Working paper. |
| Field Paper URL | Before | After https://drive.google.com/file/d/1Yb-T3oiCFqtyMf-BQaj4aqvVkXkfqH2p/view?usp=sharing |