Research Article
[Retracted] M&A Short-Term Performance Based on Elman Neural Network Model: Evidence from 2006 to 2019 in China
Table 5
The days with significant difference in the window period between 5 models.
| | Model combination | Market adjustment | Market model | Unary nonlinearity | Polynomial (low-order) | Elman |
| | Market adjustment method | — | 17 (80.95%) | 9 (42.86%) | 0 | 21 (100%) | | Market model | 17 (80.95%) | — | 7 (33.33%) | 13 (61.90%) | 21 (100%) | | Unary nonlinearity | 9 (42.86%) | 7 (33.33%) | — | 11 (52.38%) | 20 (95.24%) | | Polynomial (low-order) | 0 | 13 (61.90%) | 11 (52.38%) | — | 20 (95.24%) | | Elman | 21 (100%) | 21 (100%) | 20 (95.24%) | 20 (95.24%) | — |
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