id	keyword
emaj-242	stock
emaj-242	companies
emaj-242	ratio
emaj-242	test
emaj-242	𝐻0 hypothesis
emaj-242	prices
emaj-242	stock prices
emaj-242	countries
emaj-242	exchanges
emaj-242	period
emaj-242	series
emaj-242	data
emaj-242	unit
emaj-242	significance
emaj-242	cent