 Controlling the impact of language change or internal and external conflicts of the system, the economy principle means that systemic coherence is maintained without increasing energy cost.This is why all human languages, no matter how different they are, have high functional value as based on a compromise between the competing motivations of speaker-easiness (simplicity or "inertia") versus hearer-easiness (clarity or "energeia").The principle of economy was elaborated by the French structural–functional linguist André Martinet.