trusting your children to a school bus driver known for alcoholism. In-
stead, we rely on the collected wisdom of others. This distilled wisdom
is known as reputation and makes it possible to make fast decisions.
In more scientific terminology, people rely on so-called heuristics. A
heuristic is nothing more than a rule of thumb used to make a decision
in the face of uncertainty. Some heuristics are easy to spot: when all else
is equal, most people assume that expensive products are of higher qual-
ity than cheaper products, even to the point of telling their doctors that
a $2.50 sugar pill was more effective than an identical $0.10 sugar pill.
3
Obviously, the heuristic is wrong when applied to the sugar pill, but it is
understandable how it came about: our life experience tells us that ex-
pensive products are usually of higher quality than cheap products.
Sometimes, real-world use of heuristics can be manipulated to
comical result. The “social proof ” heuristic—a rule of thumb sug-
gesting that there is often wisdom in crowds—has been heavily used
by “candid camera” TV shows. The formula is simple: place the un-
suspecting target (the “mark”) in an unfamiliar environment, sur-
round the mark with actors who behave strangely, and then watch as
the mark conforms his own behavior to whatever odd manner the ac-
tors are adopting. The mark might face the wrong way in an elevator
because everyone else is also facing the wrong way,
4
or walk right past
a world-famous artist playing a $2.3 million violin in a subway be-
cause everyone else is treating the violinist as a common busker.
5
The
application to reputation is straightforward: Most people will follow
the crowd when deciding whom to trust, whom to befriend, and
whom to do business with. If you ever need proof that this works in
practice, then look at the way that many nightclubs artificially create
a line outside their front door in order to appear more popular and
exclusive; many people subconsciously assume that the club must be
better simply because so many people are willing to wait in line to go
inside.
Another common heuristic related to reputation is the so-called
halo effect. It was first studied by the psychologist Edward
Thorndike in the U.S. Army in 1920.
6
He discovered that once a
19Your Online Reputation Is Your Reputation