It offers no medical benefit and carries a real risk of harm for some patients.

FORBES: The Worst Quackery of 2011: Battlefield Acupuncture

Despite widespread abuse, some selective-distribution deals do benefit consumers, and others cause no harm.

ECONOMIST: Vertical restraints: Selective selling | The

They also know that instituting a floating NAV will irreparably harm the utility and benefit of the funds.

FORBES: Why Floating NAV For Money Market Funds Is A Terrible Idea

Travellers who do visit Belize, whether on a cruise or on a longer stay, can do their part to minimize their environmental harm and maximize their economic benefit.

BBC: Belize��s lessons in eco-tourism

The largest-ever study of niacin has failed to show a clinical benefit for niacin and even found a strong signal of harm.

FORBES: HPS2-THRIVE: No Benefit, Signal Of Harm For Niacin Therapy

Chemotherapy is rarely used in their treatment as it could cause more harm than benefit in patients who are elderly and frail.

BBC: Tag for aggressive bowel cancer

The debate is important, and calm analysis may conclude that off-shore drilling generates more harm than benefit.

FORBES: A Gulf Spill Reality Check

They may have a potential benefit for obesity, they also have a benefit for children's development, and they're not likely to cause the child any harm.

CNN: How to fight childhood obesity in 3 steps

But Liao argues that Zetia might actually make this inflammation worse and therefore may have less benefit at preventing heart attacks or even, theoretically, cause some harm.

FORBES: Magazine Article

Law and economics teaches that insider trading causes no important harm and, by transmitting the inside information to the market, brings an important benefit: more accurate share prices.

ECONOMIST: But don��t worry, economists are trying to make it smarter