Research Article
The Impact of the Instigator Rule on Fighting in the National Hockey League
Table 1
Fighting and penalty data comparing the Modern Era and the Expansion Era.
| Fights/gm | Total penalty (minutes/gm) | Net penalty (mins/gm) | Mean | SD | value | Mean | SD | value | Mean | SD | value |
| Stanley Cup champions | 2005–2019 | 0.36 | 0.24 | 0.24 | 11.01 | 2.90 | 0.002 | 0.17 | 0.36 | 0.002 | 1967–1980 | 0.45 | 0.21 | 14.50 | 3.75 | −0.41 | 0.77 | Conference champions | 2005–2019 | 0.38 | 0.23 | 0.10 | 11.24 | 2.75 | <0.0001 | 0.13 | 0.36 | 0.002 | 1967–1980 | 0.47 | 0.21 | 15.18 | 3.67 | −0.38 | 0.78 | Playoff teams | 2005–2019 | 0.40 | 0.20 | <0.0001 | 11.18 | 2.61 | <0.0001 | 0.02 | 0.37 | <0.0001 | 1967–1980 | 0.51 | 0.23 | 14.40 | 4.11 | −0.03 | 0.68 | Nonplayoff teams | 2005–2019 | 0.42 | 0.19 | <0.0001 | 12.06 | 3.06 | <0.0001 | −0.04 | 0.47 | 0.02 |
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