search for: pam4

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2013 Mar 07
0
initial starting values with constOptim()
...meters in order to verify that my estimation program works fine. What I have observed is that my estimation is quite sensitive to the initial parameters. For example I have 11 parameters to estimate (let's call the parameters as pam1..pam11) and their true value is: pam1=0.2 pam2=0.3 pam3=0.4 pam4=0.7 pam5=0.55 pam6=0.45 pam7=0.1 pam8=0.01 pam9=0.01 pam10=45 pam11=45 In the contrtOptim() I am setting the starting parameters as: start_param=FloatVector((pam1,pam2,pam3,pam4,pam5,pam6,pam7,pam8,pam9,pam10,pam,11)) where I set the starting values. I have observed that when I am using differen...