The key is to understand how other people respond to a tweeter. Your rating is a function of other people’s assessments. This process, a bit like voting, is harder for a single individual to ‘game’. Each person is then assigned a London PI-score (LPi-score) from 1 to 100. This being the top of the tree, all of our Top 100 have scores above 89. The London Pi-score is an influence score in the context of the London Twittersphere.
For the London 100, we focussed only on whether other people in the capital were responding to, retweeting or engaging with a tweeter.
Our maths also assesses who the people engaging with an influencer are. So a retweet from someone highly influential is worth more than a retweet from an average person. The number of followers does not factor in the weighting.
We crunched around 10bn tweets and looked at more than 150m accounts on Twitter to generate this list.
We did a couple of small pieces of editorialisation:
We excluded all corporate and brand accounts, such as newspapers.
We excluded parody accounts.
We made some other small judgements about where people were located to ensure the list was reasonably accurate.
By ‘Londoner’ we mean anyone living in London. When a user didn’t have a location on their Bio and we were unable to confirm that they lived in London they were excluded. We also excluded a few people who lived in several places unless London was their main base (sorry Piers Morgan, but you were already in the New York list!)