Table 2.

Fitting parameters for the estimate of the contact functions $H_1$, $H_2$, and $H_3$ in different countries based on the evolution of H(t) solution of the optimisation problem (43). The corresponding determination coefficient $R^2$ is also reported

$H_1$	$\underset{\text{Mar 18 - Jul 15}}{\text{France}}$	$\underset{\text{Mar 10 - Jul 15}}{\text{Italy}}$	$\underset{\text{Mar 15 - Jul 15}}{\text{Spain}}$
c	0.8972	0.8954	1.078
$\varphi$	1015	1720	1423
$R^2$	0.7515	0.7097	0.5733
$H_2$	$\underset{\text{Mar 18 - Jul 15}}{\text{France}}$	$\underset{\text{Mar 10 - Jul 15}}{\text{Italy}}$	$\underset{\text{Mar 15 - Jul 15}}{\text{Spain}}$
c	0.5973	0.7465	0.6076
$\varphi$	7.91	15.39	9.073
$R^2$	0.496	0.8507	0.3692
$H_3$	$\underset{\text{Mar 18 - Jul 15}}{\text{France}}$	$\underset{\text{Mar 10 - Jul 15}}{\text{Italy}}$	$\underset{\text{Mar 15 - Jul 15}}{\text{Spain}}$
c	0.8141	0.8424	0.9066
$\varphi$	1437	141.6	1624
$\alpha$	5.9312	2.7263	4.9578
$R^2$	0.7375	0.8872	0.6722