Estimating expansion in an economy requires objective method for separating changes in ostensible costs on a typical arrangement of labor and products, and recognizing them from these cost shifts coming about because of changes in vvorth like volume, quality, or execution. For instance, if the cost of a container of corn changes from $0.91] to $1-00 throughout the span of a year, with no adjustment of value. then This cost contrast addresses expansion. This single value change wouldn't