Very interesting, thanks for finding it.

The methods and statistics look good (feel free to correct me). However, I wish the authors would have controlled for gender. I don’t think it would significantly change the results, but behavioral finance research indicates that men are more susceptible to certain behavioral biases than women:

https://faculty.haas.berkeley.edu/odean/papers/gender/BoysWillBeBoys.pdf

Admittedly, “Boys Will Be Boys” addresses overconfidence bias rather than framing and order biases.