As is usually the case in studies of this sort, the sample size was small (and therefore not as robust as might be desirable) and the result showed an association, rather than a definite, causal relationship.

ECONOMIST: Urban brains behave differently from rural ones

As a result of the engineers' work, land titles were definite, and settlers could develop the land without fear of dispossession.

FORBES: Readers Say

Officials at the New York-based ASPCA--a nonprofit that is reliant on donations from the public--say there was a "definite increase" in donations as a result of a direct mail solicitation that went out with a picture of Lucas with a rescued pit bull.

FORBES: Law & Order, Animal Edition