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The degree and speed with which a market accurately incorporates information into prices.

Market Efficiency

The extent to which the price of an asset reflects all information available. Economists disagree on how efficient markets are. Followers of the efficient markets theory hold that the market efficiently deals with all information on a given security and reflects it in the price immediately, and that technical analysis, fundamental analysis, and/or any speculative investing based on those methods are useless. On the other hand, the primary observation of behavioral economics holds that investors (and people in general) make decisions on imprecise impressions and beliefs, rather than rational analysis, rendering markets somewhat inefficient to the extent that they are affected by people.


the relationship between the quantities of factor inputs (labour, materials, etc.) used by a firm and the quantity of output which it is able to produce using these inputs. Where a firm is able to produce the same output using fewer inputs or produce more output using the same quantity of inputs then it has improved its efficiency See PRODUCTIVITY.


the relationship between scarce FACTOR INPUTS and OUTPUTS of goods and services. This relationship can be measured in physical terms (TECHNOLOGICAL EFFICIENCY) or cost terms (ECONOMIC EFFICIENCY). The concept of efficiency is used as a criterion in judging how well MARKETS have allocated resources. See MARKET PERFORMANCE, RESOURCE ALLOCATION, ECONOMIZE.
References in periodicals archive ?
Mechanical efficiency -- Pump efficiency is only interesting if reliability is not compromised.
The mechanical efficiency plays an important role when efficiency values are used to calculate power consumption.
Although the mechanical efficiency and the indicated efficiency have the same magnitude of the uncertainty of the indicated power, these uncertainties are canceled out when the total efficiency is calculated.
2]max, lactate threshold and gross mechanical efficiency data.
Other investigations not requiring any steering or stabilization mechanisms have demonstrated significant differences in mechanical efficiency and peak power output during synchronous versus asynchronous arm cranking [5,18-19].
bth]) is the ratio of energy in the brake power (bp), Mechanical efficiency ([[eta].
Certainly, the mechanical efficiency is enhanced, but when the SMA is held in the coexistence zone for several decades, the atomic diffusion can modify the material state.
The current method uses a crude measure: the heart's mechanical efficiency at pumping blood.
8 per cent mechanical efficiency in his energy output over as much as two years - something a grand prix team would consider impossibly reliable in one of their cars.
Maybe that has something to do with that one being thoroughly believable, while this giant robot, for all its mechanical efficiency, just isn't very.
Initial clinical results in nine patients with congestive heart failure (CHF) showed that allopurinol improved cardiac mechanical efficiency by 40% and cardiac pressure efficiency by 22%.

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