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Handbook of Statistical Analyses Using SAS, Second Edition
In many situations information from a sample of individuals can be supplemented by population level information on the relationship between a dependent and explanatory variables. Inclusion of the population level information can reduce bias and increase the efficiency of the parameter estimates. Population level information can be incorporated via constraints on the model parameters. In general the constraints are nonlinear making the task of maximum likelihood estimation harder. In this paperdoi:10.1201/9781420057553.ch9 fatcat:xim7nk3zzjat5kptufdcwbpcke