Table 2.

Parameters estimation.

Region	$\mu$	$\gamma$	$b$
France	$5.3345\times 10^{-4}$	0.0184	0.0918
Italy	$9.3987\times 10^{-4}$	0.0223	0.0159
Spain	$10.00\times 10^{-4}$	0.0275	0.1041
Germany	$8.9617\times 10^{-4}$	0.0693	0.1152
Brazil	$12.00\times 10^{-4}$	0.0579	0.1473
Russia	$8.5619\times 10^{-4}$	0.0152	0.0870
New York State	$6.5199\times 10^{-4}$	0.0271	0.0815
China	$10.40\times 10^{-4}$	0.0760	0.0238