Table 1.

Parameter λ used for fitting in Fig. 2 and estimated values of other parameters. Numbers in ( $\cdots$) are estimated from other data and numbers in [$\cdots$] are inherited from the previous period. γ is fixed in the entire period.

Period	3/1$~$4/2	4/2$~$4/11	4.11$~$4/19	4.19$~$ 4/29
(14 days earlier)	(2/16$~$3/19)	(3/19 $~$(3/28)	(3/28$~$4/5)	(4/5$~$4/15)
λ	0.096	0.090	0.0	$-0.075$
$\beta N$	0.126	[0.126]	[0.126]	0.051
q	(0)	0.006	0.096	[0.096]
γ	(0.03)	(0.03)	(0.03)	(0.03)