Figure 2. Bias, Standard error and RMSE of influenza coefficients estimated from the best-fit models selected by different criteria.

Note: Lines of QAIC and QBIC are overlapping when the degrees of freedom (df) range from 2 to 10 per year. Abbreviations: QAIC, quasi-Akaike information criterion; QBIC, quasi-Bayesian information criterion; PACF, partial autocorrelation function; GCV, generalized cross validation; RMSE, root-mean-square error.