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What is the list popularity index (LPI)?

The list popularity index (LPI) is a mailing list's popularity rating on a range from 0 to 100, with 100 being the highest rating. The LPI scores are calculated using a proprietary algorithm that analyzes recency and frequency of more than 100,000 outside list recommendations made in the trailing twelve months of the scoring date.

You are welcome to share and modify this definition under the Attribution-NonCommercial-ShareAlike 3.0 United States Creative Commons License with the attribution "Definition provided by NextMark" (including the hyperlink to NextMark's home page).