The project consists of a number of experiments described in two papers: **1. "Overpricing persistence in experimental asset markets with intrinsic uncertainty**" **Authors:** Didier Sornette, Sandra Andraszewicz, Ke Wu, Ryan O. Murphy, Dorsa Sanadgol **DOI: 10.5018/economics-ejournal.ja.2020-20** **JEL Classification:** C90, D47, D80 **Abstract:** To study coordination in complex social systems such as financial markets, the authors introduce a new prediction market set-up that accounts for fundamental uncertainty. Nonetheless, the market is designed so that its total value is known, and thus its rationality can be evaluated. In two experiments, the authors observe that quick consensus emerges early yielding pronounced mispricing, which however do not show the standard “bubble-and-crash”. The set-up is implemented within the xYotta collaborative platform (https://xyotta.com). xYotta’s functionality offers a large number of extensions of various complexity such as running several parallel markets with the same or different users, as well as collaborative project development in which projects undergo the equivalent of an IPO (initial public offering) and whose subsequent trading matches the role of financial markets in determining value. xYotta is thus offered to researchers as an open source software for the broad investigation of complex systems with human participants. **2. "Behavioural effects and market dynamics in field and laboratory experimental asset markets"** **Authors:** Sandra Andraszewicz, Ke Wu, Didier Sornette **DOI: 10.3390/e22101183** **JEL Classification:** C90, D47, D80 **Abstract:** A vast literature investigating behavioural underpinnings of financial bubbles and crashes relies on laboratory experiments. However, it is not yet clear how findings generated in a highly artificial environment relate to the human behaviour in the wild. It is of concern that the laboratory setting may create a confound variable that impacts the experimental results. To explore the similarities and differences between human behaviour in the laboratory environment and in a realistic natural setting, with the same type of participants, the authors translate a field study Sornette et al. (under review) with trading rounds each lasting six full days to a laboratory experiment lasting two hours. The laboratory experiment replicates the key findings from the field study but the authors observe substantial differences in the market dynamics between the two settings. The replication of the results in the two distinct settings indicates that relaxing some of the laboratory control does not corrupt the main findings, while at the same time it offers several advantages such as the possibility to increase the number of participants interacting with each other at the same time and the number of traded securities. Experimental instructions in a form of a movie are available here: https://youtu.be/45167RNYrW0