k - SNAP - Stanford University
k - SNAP - Stanford University
k - SNAP - Stanford University
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Arbitrary bids; consider query q, bidder i<br />
Bid = x i<br />
Budget = b i<br />
Amount spent so far = m i<br />
Fraction of budget left over f i = 1-m i/b i<br />
Define ψ i(q) = x i(1-e -fi)<br />
Allocate query q to bidder i with largest value<br />
of ψ i(q)<br />
Same competitive ratio (1-1/e)<br />
3/7/2011 Jure Leskovec, <strong>Stanford</strong> C246: Mining Massive Datasets<br />
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