Some articles on unit root hypothesis, unit root:
... economic statistics, especially output, have a unit root or are trend stationary ... A unit root process with drift is given in the first-order case by where c is a constant term referred to as the "drift" term, and is white noise ... whose paper on GNP and other output aggregates failed to reject the unit root hypothesis for these series ...
Famous quotes containing the words hypothesis, unit and/or root:
“It is a good morning exercise for a research scientist to discard a pet hypothesis every day before breakfast. It keeps him young.”
—Konrad Lorenz (19031989)
“During the Suffragette revolt of 1913 I ... [urged] that what was needed was not the vote, but a constitutional amendment enacting that all representative bodies shall consist of women and men in equal numbers, whether elected or nominated or coopted or registered or picked up in the street like a coroners jury. In the case of elected bodies the only way of effecting this is by the Coupled Vote. The representative unit must not be a man or a woman but a man and a woman.”
—George Bernard Shaw (18561950)
“...there is hope for a tree, if it is cut down, that it will sprout again, and that its shoots will not cease. Though its root grows old in the earth, and its stump dies in the ground, yet at the scent of water it will bud and put forth branches like a young plant. But mortals die, and are laid low; humans expire, and where are they?”
—Bible: Hebrew, Job 14:7-10.