This page contains all the collected study materials and instructions from authors that we have compiled. We also include any comments from other contributors or follow up instructions that we have learned since the beginning of the project. Click "read more" below or choose the "Wiki" option above for further information. Contact Mark Brandt (m.j.brandt@tilburguniversity.edu) so that the materials can be made available on this website. **Abstract** Why do people purchase proenvironmental “green” products? We argue that buying such products can be construed as altruistic, since green products often cost more and are of lower quality than their conventional counterparts, but green goods benefit the environment for everyone. Because biologists have observed that altruism might function as a “costly signal” associated with status, we examined in 3 experiments how status motives influenced desire for green products. Activating status motives led people to choose green products over more luxurious nongreen products. Supporting the notion that altruism signals one’s willingness and ability to incur costs for others’ benefit, status motives increased desire for green products when shopping in public (but not private) and when green products cost more (but not less) than nongreen products. Findings suggest that status competition can be used to promote proenvironmental behavior. **Study 1 Materials** - [Status Competition Materials][3] - [Control Materials][4] - All other items are reported in [the paper][5] **Notes from Original Author (Griskevicius)** > If someone seeks to replicate the study, I would point them to think > about 2 things: > >(1) First, keep in mind that this study is capturing > a fad -- "green" consumption behavior as a substitute for prosocial > behavior in the United States. To the extent that green consumption is > no longer seen as a substitute for prosocial behavior, the effect will > cease to be. > >(2) Second, the effect is my studies was driven by > liberal individuals ("Democrats" in US political lingo). It is > specifically for these types of individuals that going green is > fashionable. Thus, I would advise researchers to measure individual > differences in political leanings as a potential moderator. [1]: mailto:h.Ijzerman@tilburguniversity.edu [2]: mailto:m.j.brandt@tilburguniversity.edu [3]: http://openscienceframework.org/project/vDo0i/files/Griskevicius_et_al_Status_Competition_FINAL_20130710123739.doc [4]: http://openscienceframework.org/project/vDo0i/files/Griskevicius_et_al_Control_Tickets_20130710123739.doc [5]: http://openscienceframework.org/project/vDo0i/files/Griskevicius_Tybur_van_den_Bergh_2010_20130710123334.pdf **Notes from CREP Team** To obtain a CREP completion certificate the minimum N for this project is 82.