TY - BOOK ID - 131093268 TI - Measuring and testing the impact of news on volatility AU - Engle, Robert F. AU - Ng, Victor K. PY - 1991 PB - Cambridge, Mass. National Bureau of Economic Research DB - UniCat UR - https://www.unicat.be/uniCat?func=search&query=sysid:131093268 AB - ER -