An oldie but a goody!
Mind you, care should always be taken to only use previous data when it is methodologically important to do so. Here are the 5 times that reusing data to enhance your survey is actually ok.
ICYMI: Five Ways to Use Previously Collected Survey Data to Improve Quality in a Survey
About the Author
Scott D. Crawford
Scott D. Crawford is the Founder and Chief Vision Officer at SoundRocket. He is also often found practicing being a husband, father, entrepreneur, forever-learner, survey methodologist, science writer & advocate, and podcast lover. While he doesn’t believe in reincarnation, he’s certain he was a Great Dane (of the canine type) in a previous life.