This paper measures integration of the world crude oil market using two so-called Thick Pen methods: the Thick Pen Measure of Association (TPMA) as well as Multi-Thickness Thick Pen Measure of Association (MTTPMA). They allow one to capture time-varying co-movement of different regional crude...

This paper introduces a new method for measuring financial market efficiency: the so- called intermittency coefficient, a parameter of the multifractal random walk model by Bacry et al. (2001). As the intermittency coefficient can quantify the degree of nonlinear deviation from a random walk, we...