The Power of Free
There is something strange about the word free. A price of zero does not behave like a very low price. It pulls at us in a way that a few cents never could.
A well-known experiment makes the point. When people were offered a premium chocolate for fifteen cents and an ordinary one for one cent, most chose the premium. When both prices dropped by a cent, so the premium was fourteen cents and the ordinary one was free, the crowd swung to the free option, even though the relative deal had not changed. Zero did something that “one cent” did not.
You can see this everywhere once you look. Free shipping tips a purchase more than an equivalent discount. A free trial converts better than a cheap one. A free gift with purchase can be worth more to a shopper than a straight price cut of the same value. The standard model says only the net cost should matter. Behaviour says the presence of a zero matters on its own.
Why? Part of it is that free removes the fear of loss. If you pay even a little and the thing turns out to be no good, you have lost something. If it is free, the downside feels like nothing, so we reach for it. Part of it is simplicity: zero needs no calculation.
This is worth knowing as a consumer, because free is often the hook on something that is not free at all, the subscription behind the trial, the data behind the app, the delivery cost folded into the price. It is also worth knowing in health and policy, where “free at the point of use” can lift take-up of a screening or a service far more than a small co-payment would predict. The lesson is not that free is a trick. It is that zero is a special number to us, and both marketers and policymakers know it.
Key reference. Shampanier, K., Mazar, N., and Ariely, D. (2007). Zero as a special price: the true value of free products. Marketing Science.
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