RT Journal Article SR Electronic T1 Correlations and Volatilities of Asynchronous Data JF The Journal of Derivatives FD Institutional Investor Journals SP 7 OP 18 DO 10.3905/jod.1998.408000 VO 5 IS 4 A1 Patrick Burns A1 Robert F Engle A1 Joseph J Mezrich YR 1998 UL https://pm-research.com/content/5/4/7.abstract AB