Peter Jackson and Philippa Boyens made 8 films together, averaging 7.94, 0.23 above their career marks. The best is The Lord of the Rings: The Return of the King at 9.0.

Peter Jackson averages 7.69, Philippa Boyens averages 7.73. Apart that suggests 7.71; together they average 7.94, a lift of +0.23.

Lift is the average of their films together minus the mean of their two career averages.