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Fig. 7. The scaling exponent for the physics-undergraduate-student density with respect to population density of 15–24-year-olds (the filled circles–-the lines connecting them are the guide to the eyes) and R2 of each regression (the shaded bar chart behind each circle) for each year, obtained from the linear regression in the log-log scale.
New Phys.: Sae Mulli 2024;74:610~620