Table 5.
New York Lag and Lead Correlation Coefficients for Each Google Keyword’s Relative Search Volume and New COVID-19 Casesa,b
| Day | R (1) | R (2) | R (3) | R (4) | R (5) | R (6) | R (7) | R (8) | R (9) | R (10) |
|---|---|---|---|---|---|---|---|---|---|---|
| −16 | 0.56 | 0.87 | 0.64 | 0.49 | 0.05 | 0.61 | 0.11 | 0.20 | 0.78 | 0.16 |
| −15 | 0.63 | 0.86 | 0.67 | 0.59 | 0.10 | 0.63 | 0.13 | 0.22 | 0.80 | 0.23 |
| −14 | 0.69 | 0.85 | 0.69 | 0.59 | 0.21 | 0.64 | 0.15 | 0.25 | 0.79 | 0.28 |
| −13 | 0.73 | 0.81 | 0.70 | 0.62 | 0.36 | 0.65 | 0.18 | 0.26 | 0.78 | 0.33 |
| −12 | 0.78 | 0.78 | 0.71 | 0.69 | 0.47 | 0.66 | 0.20 | 0.26 | 0.76 | 0.41 |
| −11 | 0.80 | 0.74 | 0.71 | 0.72 | 0.55 | 0.66 | 0.22 | 0.27 | 0.75 | 0.50 |
| −10 | 0.81 | 0.68 | 0.71 | 0.71 | 0.60 | 0.65 | 0.30 | 0.28 | 0.72 | 0.52 |
| −9 | 0.84 | 0.64 | 0.72 | 0.76 | 0.64 | 0.68 | 0.33 | 0.29 | 0.68 | 0.55 |
| −8 | 0.86 | 0.57 | 0.72 | 0.74 | 0.74 | 0.68 | 0.37 | 0.31 | 0.64 | 0.61 |
| −7 | 0.87 | 0.53 | 0.72 | 0.75 | 0.76 | 0.70 | 0.42 | 0.32 | 0.61 | 0.62 |
| −6 | 0.87 | 0.47 | 0.71 | 0.74 | 0.77 | 0.70 | 0.44 | 0.34 | 0.58 | 0.65 |
| −5 | 0.87 | 0.40 | 0.68 | 0.69 | 0.78 | 0.71 | 0.50 | 0.37 | 0.56 | 0.64 |
| −4 | 0.86 | 0.35 | 0.65 | 0.69 | 0.78 | 0.70 | 0.54 | 0.41 | 0.52 | 0.66 |
| −3 | 0.85 | 0.29 | 0.62 | 0.66 | 0.77 | 0.72 | 0.56 | 0.52 | 0.49 | 0.77 |
| −2 | 0.81 | 0.24 | 0.59 | 0.70 | 0.78 | 0.73 | 0.65 | 0.65 | 0.46 | 0.80 |
| −1 | 0.79 | 0.19 | 0.56 | 0.67 | 0.76 | 0.75 | 0.70 | 0.77 | 0.43 | 0.81 |
| 0 | 0.76 | 0.15 | 0.53 | 0.63 | 0.77 | 0.76 | 0.76 | 0.83 | 0.41 | 0.84 |
| 1 | 0.70 | 0.11 | 0.48 | 0.59 | 0.74 | 0.72 | 0.74 | 0.80 | 0.36 | 0.78 |
| 2 | 0.63 | 0.08 | 0.43 | 0.52 | 0.68 | 0.66 | 0.70 | 0.74 | 0.32 | 0.75 |
| 3 | 0.56 | 0.06 | 0.37 | 0.46 | 0.60 | 0.60 | 0.64 | 0.69 | 0.28 | 0.69 |
| 4 | 0.49 | 0.04 | 0.32 | 0.41 | 0.53 | 0.54 | 0.59 | 0.63 | 0.24 | 0.59 |
| 5 | 0.44 | 0.02 | 0.27 | 0.34 | 0.48 | 0.49 | 0.53 | 0.59 | 0.21 | 0.54 |
| 6 | 0.38 | 0.00 | 0.23 | 0.32 | 0.41 | 0.44 | 0.50 | 0.55 | 0.18 | 0.51 |
| 7 | 0.33 | −0.01 | 0.18 | 0.28 | 0.34 | 0.39 | 0.43 | 0.51 | 0.15 | 0.44 |
| 8 | 0.28 | −0.02 | 0.15 | 0.23 | 0.29 | 0.34 | 0.39 | 0.49 | 0.13 | 0.39 |
| 9 | 0.23 | −0.03 | 0.11 | 0.20 | 0.24 | 0.30 | 0.35 | 0.43 | 0.10 | 0.33 |
| 10 | 0.19 | −0.04 | 0.07 | 0.16 | 0.20 | 0.25 | 0.29 | 0.38 | 0.08 | 0.30 |
| 11 | 0.15 | −0.04 | 0.04 | 0.13 | 0.15 | 0.20 | 0.24 | 0.32 | 0.05 | 0.25 |
| 12 | 0.11 | −0.05 | 0.01 | 0.11 | 0.11 | 0.15 | 0.18 | 0.27 | 0.03 | 0.20 |
| 13 | 0.08 | −0.06 | −0.02 | 0.07 | 0.09 | 0.12 | 0.14 | 0.23 | 0.01 | 0.16 |
| 14 | 0.05 | −0.06 | −0.05 | 0.06 | 0.06 | 0.08 | 0.10 | 0.18 | −0.01 | 0.13 |
| 15 | 0.02 | −0.06 | −0.07 | 0.03 | 0.04 | 0.04 | 0.05 | 0.13 | −0.03 | 0.10 |
| 16 | 0.00 | −0.07 | −0.09 | 0.02 | 0.02 | 0.01 | 0.02 | 0.08 | −0.04 | 0.06 |
COVID-19 = coronavirus disease 2019.
Google keywords: (1) = COVID symptoms; (2) = coronavirus symptoms; (3) = sore throat + shortness of breath + fatigue + cough; (4) = coronavirus testing center; (5) = loss of smell; (6) = Lysol; (7) = antibody; (8) = face mask; (9) = coronavirus vaccine; (10) = COVID stimulus check.