De l’évaluation des stock options en « juste valeur » : apport de l’approche comportementale

Our research focuses on the relevance of the descriptive framework to the representation of decisional behavior aspects in financial instruments fair value models. This issue is analyzed in the case of stock options through three essays: The first paper gives rise to new behavioral factors affecting exercise decision of stock option holders. These findings underscore the importance of considering behavioral factors in the stock options fair value models. In the second essay we examine stock options subjective valuation and the implied incentive effects to a cumulative prospect theory (CPT) representative employee. Our model predicts that the employee may overestimate the value of his options in-excess of their risk-neutral value. In addition, the model incentive effects predictions are consistent with actual compensation practices. The last essay relies on the CPT framework to provide an alternative approach for the valuation of standard employee stock options and for the analysis of exercise behavior patterns. Our empirical analysis proved that the CPT model is the best performing among many competing models in predicting actual exercise patterns.