Parameters and free-riding behavior: multilevel logistic regression analysis with an interaction term between the risk of infection parameter and proportion of others vaccinated.
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*P**P***PaNo formal statistical test was conducted to test if the random effect equals zero.Observations from Round 2 to Round 24 were used for the analysis. The random effect at the group level was not shown as it was estimated as zero.
创建时间：
2015-12-02
