If the marginal benefit of each activity decreases in the presence of the other activity, then chances are they aren't worth pursuing together.
The much talked about Gesture control offers very marginal benefit on a small screen and as often as not the phone did not pick up the gesture.
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Mr. HAMMOND SHAW (HKS and Company): The days of marketing new drugs with only marginal benefit but supported by this huge sales force and marketing machine are over.
Unfortunately, the fight over whether to greenlight Keystone XL is creating collateral damage that vastly outweighs the marginal benefit either side will gain from sticking to its current position.
But the bottom line is that innovation strategies should be pursued simultaneously only if they complement each other that is, if the marginal benefit of each activity increases in the presence of the other activity.
And rather than suggesting it was folly for AstraZeneca to support this study, they should receive public praise and encouragement for taking a risk and putting the key question about the marginal benefit of their product on the table.
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In private markets, people are likely to acquire levels of education beyond basic literacy and numeracy, so the amount of education that would emerge in the market is probably that for which the marginal benefit is equal to the marginal cost.
After last year's ruling, Peter Littlejohns, NICE's clinical and public health director, noted that "there is a limited pot of money, " that the drugs were of "marginal benefit at quite often an extreme cost, " and the money might be better spent elsewhere.
In formal terms, the consumer has an incentive to spend until the marginal benefit of additional spending, or additional health care is zero, so different from an efficient market, where consumers spend until the marginal benefit is equal to the marginal cost.
Several studies have shown that this leads to significantly greater spending, and only marginal medical benefit.
The net benefit was marginal, and given the huge costs associated with culling, was not economically viable.
Defeatist notions of a bankrupt nation doomed to marginal status must be avoided: they benefit no one.
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For economists, the average value of a good or service is usually less important than the marginal value the cost or benefit of one more unit.
But she warns that before you go this route, you should weigh the benefit of a 5% lower marginal rate (that is paying 55% instead of 60% while the estate is in surtax territory) against the value of deferring more of the taxes until the second spouse dies.
The liberal claim that this means a tax cut for the wealthy is based entirely on the fact that marginal tax rates would decline, even though the loopholes primarily benefit higher-income taxpayers.
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