For XOS buyers with k copies per item, supply-based posted pricing obtains a 1-(k/(k+1))^k competitive ratio, and dynamic pricing obtains 1-O(sqrt(log k/k)).
This buys all copies of the first item while not touching the second item, so both µ′ and δ′ gains 1 2
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Multi-Unit Combinatorial Prophet Inequalities
For XOS buyers with k copies per item, supply-based posted pricing obtains a 1-(k/(k+1))^k competitive ratio, and dynamic pricing obtains 1-O(sqrt(log k/k)).