Hi there,
I am a relatively new user of nGene and I am a little bit confused about using nGene to produce efficient design.
I have used nGene previously to produce labelled and non labelled designs using priors derived from a mix of past research and gut feeling. I was fine with all this so far but recently came across Appendix 7B - Steps in generating efficient stated choice designs (page 131 in the manual) which list the following steps:
(1) specify the utility specifications for the likely final model
(2) randomly populate the design matrix to create an initial design
(3) calculate the choice probability of each alternative in the design (using draws because i have priors with distributions)
(4) constuct the AVC matrix etc...
(5) evaluate the statistical efficiency of the design
(6) go through a number of iterations (repeat 3 to 5)
Apologies if this is a stupid question but is the appendix describing what the software does or what I should be doing?! I am not sure whether I need to do anything with the information in this appendix.
Regards
E