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. 2016 Feb 5;11(2):e0146291. doi: 10.1371/journal.pone.0146291

Fig 4. Superlinear scaling of total spending activity with city size for the Conurbation level.

Fig 4

Total spending activity is defined as the cumulative number of transactions made by city residents. Scaling exponent: 1.045, confidence interval: [1.03,1.06], p-value: 4 ⋅ 10−205, R2 = 99.0%.