Short-term Fluctuation around a long-term trend in Economic Growth. This concept is related to the ideas of Recession (Bust) and Expansion (Boom). This conclusion incorporates the assumption (paradigm) that there is a long-term sustainable growth that can be acheived / that is optimal to be acheived. Therefore deviations from this trend would cause pressures in the economy that would unravel and cause a correction to a boom, or period of "pent-up demand during a bust."