Garry Marshall and Marc Silverstein made 2 films together, averaging 6.05, 0.34 below their career marks. The best is Never Been Kissed at 6.2.

Garry Marshall averages 6.15, Marc Silverstein averages 6.62. Apart that suggests 6.39; together they average 6.05, a lift of −0.34.

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