Fig. 7From: Estimation of the reproduction number of influenza A(H1N1)pdm09 in South Korea using heterogeneous modelsResidual sum of squares (RSS) which measures the goodness-of-fit in least squares estimation using three different models as time passes: The time average values of RSS for the basic, age-structured and region-structured models are 1.097×1011,1.787×109, and 7.023×108, respectivelyBack to article page