Table 2 Bivariate Moran’s I statistic for POI-CBG network for income groups.

City	Jan 27–Feb 2			Apr 6–12			Jun 15–21
City	Moran’s I	H–H	L–L	Moran’s I	H–H	L–L	Moran’s I	H–H	L–L
Income groups
Chicago	0.091	176	109	0.343	478	469	0.132	234	347
Houston	0.212	167	124	0.283	173	198	0.035	108	143
Los Angeles	0.046	213	172	0.235	476	589	0.003	262	316
New York City	0.039	192	154	0.238	414	541	0.289	375	698
Seattle	0.076	47	41	0.285	171	172	0.099	141	88
White and non-white groups
Chicago	0.126	150	156	0.341	445	547	0.125	186	428
Houston	0.141	116	124	0.077	93	199	− 0.087	59	169
Los Angeles	0.018	179	189	0.118	365	619	− 0.200	180	399
New York City	0.033	158	178	0.225	422	584	0.178	286	758
Seattle	0.021	27	45	0.156	138	160	0.078	105	130

The Bivariate Moran’s I statistic was calculated for the five urban locations for the median income groups and the percentage of white and non-white groups. Jan 27–Feb 2 represents a time period before the stay-at-home policy; Apr 6–12 represents a time period after stay-at-home policy and Jun 15–21 represents a time period following weeks after the stay-at-home policy. H–H represents the number of high–high clusters and L–L represents the number of low–low clusters; both of the number of observed clusters were statistically significant of at least p-values < 0.05.

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