In Law, Political Science, and Economics, it is possible to be recruited directly as a full professor by passing the "agrégation" (distinct from the secondary school system's "agrégation", more widespread). Consequently, some scholars become professors without prior experience as a Maître de conférences. This remains rare however, most of the time the aggregation is a way to accelerate career advancement for the Maîtres de conférences (this is known as the "voie courte", or short way, as opposed to the "voie longue").