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Matlab scripts for plotting parameter indeterminacy in Classical Twin Designs:
Plotting CTD Parameter Space for when CV(DZ)/CV(MZ) > 1/2
Plotting CTD Parameter Space for when CV(DZ)/CV(MZ) < 1/2
For more information, see Keller, M. C. & Coventry, W. L. (2005). Quantifying and addressing parameter indeterminacy in the classical twin design. Twin Research and Human Genetics, 8, 201-213.
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