In Friedman’s original work, the natural unemployment rate was a purely theoretical conjecture, founded on an assumption described as “rational expectations,” even though it ran counter to any normal definition of rational behavior.
En la obra original de Friedman, la tasa de desempleo natural era una conjetura puramente teórica, basada en una hipótesis denominada “esperanzas racionales”, aun cuando fuera contraria a toda definición normal de comportamiento racional.