double-blind study - an experimental procedure in which neither the subjects of the experiment nor the persons administering the experiment know the critical aspects of the experiment; a double-blind procedure is used to guard against both experimenter bias and placebo effects.
No they get more expensive, airlines will always advise you to book in advance to take advantage of their best fares. Sometimes they do a special deal but not within a week of flying. I would try another airline or make different plans.
Katia Hetter, CNN â¢ Updated 22nd December 2015. (CNN) â Although rumors abound about the best times to buy the most affordable holiday plane tickets, flying during some of the year's busiest travel periods won't be cheap.