- [Yan] It's good that we have an army of enthusiasts
writing Wikipedia articles,
but sometimes when it concerns a disease that I might have,
I really want the experts' input.
♪ [music] ♪
Wikipedia is one of the most important references for the general public.
It's actually one of the most top five most visited websites in the world.
Everyone reads Wikipedia articles, but sometime you spot an error
or you say, "Well, this is not really correct."
But you move on
and say, "Someone else might fix it."
That's called the "free rider problem."
The success of Wikipedia has been really surprising
for economists because it relies purely on volunteer labor.
The medical profession has found that