Rule of 70 Real GDP Doubling in Macroeconomics Comparison Between Two Countries
The Rule of 70 is a mathematical approximation used in macroeconomics to estimate the time required for an economic variable, such as real GDP per capita, to double given a constant annual growth rate. Formally defined by dividing 70 by the percentage growth rate ($T_{doubling} = 70 / r$), this principle allows analysts to project compound exponential growth without relying on complex iterative calculations. As a heuristic within comparative economic analysis, it facilitates rapid assessment of long-term divergence in development levels between economies with differing but constant growth trajectories.
Rule of 70 Real GDP Doubling in Macroeconomics Comparison Between Two Countries
The Rule of 70 is a mathematical approximation used in macroeconomics to estimate the time required for an economic variable, such as real GDP per capita, to double given a constant annual growth rat…