Petites causes, grands effets is a film from the Parnaland film studio presumed to have been made sometime within the years 1902-1904. It was presumably directed by Ambroise-François Parnaland perhaps with the assistance of cameraman Clément-Maurice. It was found among the films collected by Gregorio Antonino María Sagarmínaga y Aberasturi known as La colección Sagarmínaga.