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.
By Rick Steves. Your plane ticket to Europe will likely be your biggest trip expense â and these days, thereâs no such thing as a free lunch in the airline industry. (In fact thereâs usually no lunch at all.) Because airlines offer fewer flights and sales, youâll have to be on your toes to get the best deal.