id	keyword
emaj-57	news
emaj-57	market
emaj-57	firm
emaj-57	size
emaj-57	earnings
emaj-57	announcement
emaj-57	stock
emaj-57	event
emaj-57	volatility
emaj-57	returns
emaj-57	journal
emaj-57	study
emaj-57	overreaction
emaj-57	date