请帮忙将以下英文译成汉语~The success of incomplete information models de

请帮忙将以下英文译成汉语~
The success of incomplete information models derives in part from time varying
dispersion in the posterior density of the unobserved drift rate,a feature alternatively
referred to as fluctuating confidence in David (1997) and as Bayesian uncertainty in
Veronesi (2004).