a and b

--- Оригінальне повідомлення ---
Від кого: "Tim Nall" <tnall.ling@gmail.com>
Дата: 5 травня 2014, 15:23:19

There is evidence for a cointegrating relationship if:
(a) The unit-root hypothesis is not rejected for the individual variables.
(b) The unit-root hypothesis is rejected for the residuals (uhat) from the
    cointegrating regression.

..would that be correctly read as "a and b" or "a or b"? Sorry for the
simple question.
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