You need to sign in or sign up before continuing.
Back to History

Fields Changed

Registration

Field Before After
Trial Status on_going completed
Trial End Date March 31, 2025 January 31, 2025
Last Published September 12, 2024 05:08 AM February 13, 2025 08:04 PM
Study Withdrawn No
Intervention Completion Date October 28, 2022
Data Collection Complete Yes
Final Sample Size: Number of Clusters (Unit of Randomization) N/A
Was attrition correlated with treatment status? No
Final Sample Size: Total Number of Observations 830 individuals
Final Sample Size (or Number of Clusters) by Treatment Arms Control group (n = 275) Prosocial incentive treatment group (n = 273) Financial incentive treatment group (n = 282)
Is there a restricted access data set available on request? No
Program Files Yes
Program Files URL https://doi.org/10.1016/j.ecolecon.2024.108506
Data Collection Completion Date March 31, 2023
Is data available for public use? No
Back to top

Papers

Field Before After
Paper Abstract Ascertaining the number, type, and location of plant, insect, and animal species is essential for biodiversity conservation. However, it is difficult to comprehensively monitor the situation using only expert-led surveys, and therefore information voluntarily provided by citizens is helpful in determining species distribution. To effectively encourage citizens to share data, this study proposed a prosocial incentive that rewards providing species information with donations for endangered species conservation activities. We conducted a field experiment with users (N = 830) of a widely used Japanese smartphone app “biome” where they post species photos and measured the incentive's effect on their posting behavior. In addition, we measured the effect of a financial incentive that provides monetary rewards for posting species photos and compared the two incentives' effects. The analyses revealed that while the prosocial incentive did not increase the number of posts on average, it could influence the content of the posts, increasing the proportion of posts on rare species. In contrast, the financial incentive significantly increased the total number of posts and, in particular, the number of posts on less rare and invasive species. Our results indicate that the prosocial and financial incentives could stimulate different motivations and encourage different posting behaviors.
Paper Citation Sasaki, S., Kubo, T., & Kitano, S. (2025). Prosocial and financial incentives for biodiversity conservation: A field experiment using a smartphone app. Ecological Economics, 230, 108506.
Paper URL https://doi.org/10.1016/j.ecolecon.2024.108506
Back to top