Chabi-Yo, Fousseni; Garcia, René; Renault, Eric - In: Review of Financial Studies 21 (2008) 2, pp. 973-1011
Risk aversion functions extracted from observed stock and option prices can be negative, as shown by Aït-Sahalia and Lo (2000), Journal of Econometrics 94: 9--51; and Jackwerth (2000), The Review of Financial Studies 13(2), 433--51. We rationalize this puzzle by a lack of conditioning on latent...