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.
3. Booking to Fly on a More Expensive Day. Another common mistake that people make is forgetting to check flexible dates. Different days of the week usually offer different fares. For example, flights leaving the U.S. on Tuesdays, Wednesdays, and Saturdays are the least expensive days to fly, according a study by Fare Compare. If your schedule is adjustable and you're not checking flexible dates, you're probably paying more than you should for your ticket. Prices can vary wildly from day to day for the exact same flight. 4. Flying Into a More Expensive Airport. Some airports cost more to fly into than others, depending on taxes and airport fees.