Sign...Price Reduced

First of all, I hope that you and your loved ones had a very Happy Thanksgiving.  Secondly, back to business.  I have a question to all you who have been in the business for many years.   I recently read conflicting arguments about using a sign to advertise when you have a price reduction on a listing.  Do you use a "price reduced" sign when you lower the price of a listing?  And, if you do use a "price reduced" sign, what have been the benefits?  And, if you don't use a "priced reduced" sign, why not?  I really would like to hear the pros and cons.