Answer:
<em>Learning Curve Effect</em>
Explanation:
The learning curve was first defined in 1885 by psychologist Hermann Ebbinghaus and is used as a means of measuring the quality of output and estimating costs.
<em>A learning curve is a term that visually represents the cost-output relationship over a specified period of time, usually representing an employee's or worker's repetitive task.</em>
GDP is known as a lagging indicator.
Unemployment rate is also a lagging indicator.
Inflation is a lagging indicator.
Pretty sure National debt is not considered an economic indicator.
Columbus departed from Castilian palos de la frontera to find a shorted trade rout to india.