Semiparametric estimation of a bivariate fractionally cointegrated system is considered. We propose a two-step procedure that accommodates both (asymptotically) stationary (d<1/2) and nonstationary (d>=1/2) stochastic trend and/or equilibrium error. A tapered version of the local Whittle estimator of Robinson (2008) is...</1/2)>

We introduce robust kurtosis, which is a new quantile-based measure for the kurtosis of stock returns. For approximately normal distributions, robust kurtosis is equivalent to the traditional moment-based kurtosis. For fat-tailed distributions, when kurtosis matters the most, robust kurtosis...