Table 2.
The optimal number of phases and topics by country.
| Country | Phase 0 | Phase 1 | Phase 2 | Phase 3 | Phase 4 | Phase 5 | |||||||
| South Korea | N/Aa | N/A | |||||||||||
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Time period | Jan 1-19, 2020 | Jan 20-Feb 12, 2020 | Feb 13-Mar 9, 2020 | Mar 10-27, 2020 |
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Total tweets, n | 507 | 161,790 | 672,080 | 366,073 |
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Average users per day | 14.06 | 2415.52 | 5376.77 | 5577.88 |
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Average original tweets per day | 28.17 | 5244.09 | 17,796.08 | 13,095.65 |
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Average retweets per day | 21.78 | 56,809.78 | 211,310.89 | 147,759.41 |
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Tweet depthb | 0.77 | 10.83 | 11.87 | 11.28 |
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Topics determined by perplexity, n | 2 | 41 | 15 | 43 |
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75th percentile of topicsc, n | 1 | 18 | 6 | 14 |
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Final topicsd, n | 1 | 8 | 5 | 11 |
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| Iran | N/A | N/A | N/A | N/A | |||||||||
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Time period | Jan 1-Feb 18, 2020 | Feb 19-Mar 30, 2020 |
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Total tweets, n | 15,473 | 437,176 |
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Average users per day | 245.34 | 1442.46 |
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Average original tweets per day | 385.63 | 5272.04 |
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Average retweets per day | 1315.13 | 22,128.76 |
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Tweet depth | 3.41 | 4.20 |
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Topics determined by perplexity, n | 3 | 5 |
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75th percentile of topics, n | 2 | 4 |
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Final topics, n | 3 | 6 |
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| Vietnam | |||||||||||||
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Time period | Jan 1-20, 2020 | Jan 21-25, 2020 | Jan 26-Feb 15, 2020 | Feb 16-Mar 4, 2020 | Mar 5-22, 2020 | Mar 23-31, 2020 | ||||||
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Total tweets, n | 140 | 1499 | 18,424 | 28,458 | 26,950 | 12,292 | ||||||
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Average users per day | 3.79 | 131.25 | 179.65 | 485.59 | 340.65 | 433.29 | ||||||
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Average original tweets per day | 7.37 | 218.50 | 686.60 | 1238.77 | 1089.94 | 1224.00 | ||||||
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Average retweets per day | 0.21 | 20.75 | 159.80 | 582.29 | 192.24 | 201.86 | ||||||
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Tweet depth | 0.03 | 0.09 | 0.23 | 0.47 | 0.18 | 0.16 | ||||||
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Topics determined by perplexity, n | 19 | 3 | 6 | 46 | 48 | 16 | ||||||
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75th percentile of topics, n | 1 | 1 | 3 | 22 | 19 | 4 | ||||||
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Final topics, n | 1 | 2 | 4 | 7 | 10 | 2 | ||||||
| India | N/A | N/A | N/A | ||||||||||
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Time period | Jan 1-29, 2020 | Jan 30-Mar 9, 2020 | Mar 10-27, 2020 |
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Total tweets, n | 3088 | 151,210 | 1,219,030 |
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Average users per day | 107.41 | 1364.95 | 13,318.63 |
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Average original tweets per day | 269.72 | 4261.13 | 58,924.55 |
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Average retweets per day | 415.69 | 14,467.8 | 318,368.05 |
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Tweet depth | 1.54 | 3.40 | 5.40 |
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Topics determined by perplexity, n | 3 | 50 | 47 |
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75th percentile of topics, n | 2 | 22 | 20 |
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Final topics, n | 3 | 5 | 9 |
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aN/A: not applicable.
bMeasured as the ratio of retweets to original tweets.
cMajor topics.
dAfter human annotators merged similar themes.