> これはimprovementとinventionの性質が異なることを示している。
In addition, the improvement is roughly proportional to the square root times the size, but there is a pattern in which the estimated value of the index increases as the size increases. This means that as the size increases, the rate of increase of the slope becomes steeper (a statistical test may be required). Invention, on the other hand, does not show such a tendency.
This indicates that the properties of improvement and innovation are different.