Table 2.

Best parameters for power law model

Dataset	Rate beneficial mutations	Rate neutral mutation	α	k	λ
E. coli	8.5e − 05	1.1e − 03	0.32	0.13	66
Budding yeast	6.0e − 05	1.9e − 02	0.40	0.20	1.2
Budding yeast 30	3.0e − 04	1.0e − 03	0.26	0.27	1.2
Budding yeast 37	2.0e − 04	2.0e − 03	0.13	0.41	1.9
Fission yeast	2.3e − 05		0.31	0.13	57