Reiß, Markus; Todorov, Viktor; Tauchen, George Eugene - 2014
We derive a nonparametric test for constant (continuous) beta over a fixed interval of time. Continuous beta is defined … the observation grid shrinking to zero. We first form a consistent and asymptotically mixed normal estimate of beta using … all the observations within the time interval under the null hypothesis that beta is constant. Using it we form an …