The disclosed embodiments provide a system for processing data. During operation, the system calculates one or more quantiles from a distribution of historic user engagement with content within a member segment of a social network. Next, the system performs a comparison of the one or more quantiles with a current measurement of user engagement with a content item within the member segment. When the comparison indicates that the current measurement of user engagement exceeds a threshold, the system presents the content item to one or more members in the member segment.
Please help me write a proper abstract based on the patent claims. CLAIM: 1. A method, comprising: calculating, by a computer system, one or more quantiles from a distribution of historic user engagement with content within a member segment of a social network; performing, by the computer system, a comparison of the one or more quantiles with a current measurement of user engagement with a content item within the member segment; and when the comparison indicates that the current measurement of user engagement exceeds a threshold, presenting the content item to one or more members in the member segment. 2. The method of claim 1, wherein calculating the one or more quantiles from the distribution of historic user engagement with content within the member segment comprises: calculating the one or more quantiles from a set of historic measurements of user engagement with content within the member segment. 3. The method of claim 2, wherein calculating the one or more quantiles from the distribution of historic user engagement with content within the member segment further comprises: omitting one or more historic measurements from the set of historic measurements when an exposure of the member segment to one or more content items associated with the one or more historic measurements does not meet a minimum exposure level. 4. The method of claim 3, wherein the minimum exposure level comprises a minimum number of impressions. 5. The method of claim 1, further comprising: verifying a minimum level of user engagement with content within the member segment prior to performing the comparison. 6. The method of claim 1, wherein the threshold comprises a value from the one or more quantiles. 7. The method of claim 1, wherein presenting the content item to the one or more members in the member segment comprises: outputting a notification of the content item to the one or more members. 8. The method of claim 1, wherein presenting the content item to the one or more members in the member segment comprises: selecting the one or more members for presentation of the content item based on a lack of prior exposure to the content item. 9. The method of claim 1, wherein the current measurement of user engagement comprises a click-through rate (CTR) for the content item. 10. The method of claim 1, wherein the member segment is associated with at least one of: an industry; a company; a company type; a skill; a decision maker; a publisher; one or more connections; and a job function. 11. An apparatus, comprising: one or more processors; and memory storing instructions that, when executed by the one or more processors, cause the apparatus to: calculate one or more quantiles from a distribution of historic user engagement with content within a member segment of a social network; perform a comparison of the one or more quantiles with a current measurement of user engagement with a content item within the member segment; and when the comparison indicates that the current measurement of user engagement exceeds a threshold, present the content item to one or more members in the member segment. 12. The apparatus of claim 11, wherein calculating the one or more quantiles from the distribution of historic user engagement with content within the member segment comprises: calculating the one or more quantiles from a set of historic measurements of user engagement with content within the member segment. 13. The apparatus of claim 12, wherein calculating the one or more quantiles from the distribution of historic user engagement with content within the member segment further comprises: omitting one or more historic measurements from the set of historic measurements when an exposure of the member segment to one or more content items associated with the one or more historic measurements does not meet a minimum exposure level. 14. The apparatus of claim 11, wherein the memory further stores instructions that, when executed by the one or more processors, cause the apparatus to: verify a minimum level of user engagement with content within the member segment prior to performing the comparison. 15. The apparatus of claim 11, wherein presenting the content item to the one or more members in the member segment comprises: outputting a notification of the content item to the one or more members. 16. The apparatus of claim 11, wherein presenting the content item to the one or more members in the member segment comprises: selecting the one or more members for presentation of the content item based on a lack of prior exposure to the content item. 17. The apparatus of claim 11, wherein the current measurement of user engagement comprises a click-through rate (CTR) for the content item. 18. The apparatus of claim 11, wherein the member segment is associated with at least one of: an industry; a company; a company type; a skill; a decision maker; a publisher; one or more connections; and a job function. 19. A system, comprising: a content-selection module comprising a non-transitory computer-readable medium comprising instructions that, when executed, cause the system to: calculate one or more quantiles from a distribution of historic user engagement with content within a member segment of a social network; and perform a comparison of the one or more quantiles with a current measurement of user engagement with a content item within the member segment; and a presentation module comprising a non-transitory computer-readable medium comprising instructions that, when executed, cause the system to present the content item to one or more members in the member segment when the comparison indicates that the current measurement of user engagement exceeds a threshold. 20. The system of claim 19, wherein calculating the one or more quantiles from the distribution of historic user engagement with content within the member segment comprises: omitting one or more historic measurements from a set of historic measurements of user engagement with content in the member segment when an exposure of the member segment to one or more content items associated with the one or more historic measurements does not meet a minimum exposure level; and after the one or more historic measurements are omitted from the set of historic measurements, calculating the one or more quantiles from a remainder of the set of historic measurements.