We investigate whether several families of generalized quantiles (expectiles, Lp-quantiles and M-quantiles) respect various stochastic orders (the usual stochastic order, the convexity order, and the p-convexity orders).

We show that the characterization of the strict stationarity domain for a [delta]-power stable Garch model obtained in Mittnik et al. [2002. Stationarity of stable power-GARCH processes. J. Econometrics 106, 97-107] can be extended to general innovations, regardless of the existence of their...