Computes two measures of model fit for bond yields
YieldsFitJoint(ModelType, ModelPara, FactorLabels, Economies)
string-vector containing the label of the model to be estimated
list of model parameter estimates (see the "Optimization" function)
string-list based which contains all the labels of all the variables present in the model
string-vector containing the names of the economies which are part of the economic system
"Model-implied yields" is the measure of fit based exclusively on the risk-neutral parameters, whereas the "Model-Fit" takes into account both the risk-neutral and the physical parameters.
See, for instance, Jotiskhatira, Le and Lundblad (2015). "Why do interest rates in different currencies co-move?" (Journal of Financial Economics)