Before revision:  A series of treatments aimed at identifying mechanisms suggests that  the behavior of other people are often "ambiguous" to a decision maker who observes their choices . So, the decision maker behaves as if she has limited ability to infer the relationship between what other people choose and what they know .
After revision:  A series of treatments aimed at identifying mechanisms suggests that the behavior of other people are often "ambiguous" to a decision maker who observes their choices . So, she might have difficulty in inferring the information contained in others' choices. A general decision-making process is then non-parametrically estimated and sheds light on the identification of three types of error in subjects' behavior .