This paper analyses the long-memory properties of high frequency financial time series. It focuses on temporal aggregation and the influence that this might have on the degree of dependence of the series. Fractional integration or I(d) models are estimated with a variety of specifications for...

We study how monetary policy and risk shocks affect asset prices in the US, the euro area, and Japan, differentiating between "traditional" monetary policy and communication events, each decomposed into "pure" and information shocks. Communication shocks from the US spill over to risk in the...

In this paper we specify a multi-factor long-memory process that enables us to estimate the fractional differencing parameters at each frequency separately, and adopt this framework to model quarterly prices in three European countries (France, Italy and the UK). The empirical results suggest...