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The descriptive statistics of the datasets with different sparsity.
| No. | Dataset | No. of investments per user | Sparsity (%) | No. of investors | No. of projects | No. of investments |
|---|---|---|---|---|---|---|
| 1 | Less sparse dataset | 9 and more | 94.36 | 639 | 220 | 7922 |
| 2 | Medium sparse dataset | 5∼8 | 96.81 | 2986 | 229 | 21847 |
| 3 | Extremely sparse dataset | 3∼4 | 97.95 | 8598 | 230 | 40542 |
