. 2020 Jul 30;220(1):63–85. doi: 10.1016/j.jeconom.2020.07.038

Table 9.

Standard deviation of estimates of $R_{0}$ for DGP (5.5)–(5.6).

	Deaths	Cases	SUR, Efficient $W$	SUR, Diagonal $W$	SUR, Identity $W$
Panel A: No Rounding, True $E_{0} = 2$ and $I_{0} = 0$ , Assumed $E_{0} = 2$ and $I_{0} = 0$

Levels, Cumulative	0.0364	0.0352	0.0258	0.0255	0.0351
Levels, Daily	0.1110	0.1010	0.0706	0.0693	0.1026
Logs, Cumulative, Trim	0.0260	0.0261	0.0195	0.0188	0.0176
Logs, Daily, Trim	0.0464	0.0451	0.0343	0.0340	0.0325
Logs, Cumulative, No Trim	0.0065	0.0069	0.0049	0.0049	0.0048
Logs, Daily, No Trim	0.0061	0.0064	0.0044	0.0044	0.0044

Panel B: No Rounding, True $E_{0} = 2$ and $I_{0} = 0$ , Estimated $E_{0}$ and $I_{0}$

Levels, Cumulative	0.0366	0.0351	0.0270	0.0275	0.0396
Logs, Cumulative, Trim	0.0261	0.0261	0.0227	0.0239	0.0177
Logs, Cumulative, No Trim	0.0075	0.0079	0.0056	0.0056	0.0053

Panel C: Rounding, True $E_{0} = 2$ and $I_{0} = 0$ , Assumed $E_{0} = 2$ and $I_{0} = 0$

Levels, Cumulative	0.050	0.035	0.037	0.032	0.035
Levels, Daily	0.112	0.101	0.070	0.070	0.103
Logs, Cumulative, Trim	0.060	0.027	0.038	0.031	0.033
Logs, Daily, Trim	0.082	0.046	0.045	0.044	0.047
Logs, Cumulative, No Trim	0.097	0.021	0.022	0.021	0.048
Logs, Daily, No Trim	0.073	0.024	0.023	0.024	0.038

Panel D: Rounding, True $E_{0} = 2$ and $I_{0} = 0$ , Estimated $E_{0}$ and $I_{0}$

Levels, Cumulative	0.050	0.035	0.043	0.043	0.040
Logs, Cumulative, Trim	0.060	0.027	0.038	0.034	0.033
Logs, Cumulative, No Trim	0.097	0.021	0.022	0.021	0.048

The table presents the standard deviation of the estimates of $R_{0}$ across 500 simulation draws for different estimation methods. The estimates in the first column are based on the deaths data only. The estimates in the second column are based on the reported cases data only. The estimates in the remaining three columns combine the deaths and reported cases data and use different weighting matrices.