Choose thebestanswer. The data and results in the study by Gneezy and Rustichini "A Fine is a Price" can be best explained by: A rational model in which introducing a fine provides new information to parents about their strategic situation. A behavioural model in which introducing a fine changes parents' perceptions about the appropriate social norm. An economic model in which introducing a "large enough" fee early in the year can reduce undesirable behaviour. Both a and b