The first step in managing lending and trading risks is to collect data on the frequency and size of past losses.

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The services increase the size of purchases and frequency of purchases, increasing repeat purchase rates to as high as 60%, Yoshimura says.

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No deaths have been blamed on attacks by those groups so far, but the attacks have increased in frequency and size, said Lewis.

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"We should not wait for a serious incident before deciding upon an appropriate degree of regulation - not something heavy handed but something recognising that both the frequency and size of these huge commercial cycling events have greatly increased, " he said.

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The number of times it vibrates per second (frequency) and the size of its waves (wavelength) vary inversely.

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This development is made possible by a new wave of technology: radio-frequency ID chips the size of pepper grains, broadband wireless and Web-based "dashboards" enabling monitoring and management.

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The size of deserts would increase, along with the frequency and intensity of wildfires.

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The energy generators and frequency regulators they work with must be of a certain size.

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Audit problems can be gauged by factors like the size of the discretionary accruals that firms are allowed to make and the frequency with which accounts are restated.

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Manoj Narang of Tradeworx, argued that high-frequency traders create liquidity and hold less capital than a mid-size hedge fund.

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