This is the main reason for the failure of a Los Angeles Times experiment with wikitorials, described in the previous article.

ECONOMIST: Are many minds better than a few?

Whatever the mechanism, though, this study provides what no previous study ever has: evidence from a controlled experiment that keystone species really exist.

ECONOMIST: Ecology: Under the mistletoe | The

When the first six months of the Hamilton experiment are compared with the same winter months of the previous year, crime levels actually went up slightly.

ECONOMIST: Tackling yobbery