Table 1.

Empirical observations of power-law with exponential decay distributions, p(x) ∼ x^−B exp(−x/C)

System with p(x) ∼ x−B exp(−x/C)	Exponent, B	Cutoff, C
Full protein-interaction map of Drosophila (26)	1.20 ± 0.08	27 ± 4
High-confidence protein-interaction map of Drosophila (26)	1.26 ± 0.25	3.9 ± 0.8
Gene-flow/hybridization network of plants as function of spatial distance (27)	0.75	105 m
Earthquake magnitude (28, 29)	1.35–1.7	≈1021 Nm
Avalanche size of ferromagnetic materials (30)	1.2–1.4	L1.4 (L is sample size)
ArXiv coauthor network (25)	1.3 ± 0.1	53 ± 5
MEDLINE coauthor network (25)	2.1 ± 0.5	≈5,800
PNAS paper citation network (10)	0.49	4.21