We found that the occasions specific residual variances, σ[ct] (t = 1,…,4), and the C innovations were zero, σ[ζCt] (t = 2,3,4).
The rejection of occasion-specific clothing seemed to happen in a rush in the late '60s.
Why worry about centuries of religious conflict when you can bond over the slaughtering of woodland creatures for high-end, occasion-specific headwear?
We retained the constraints on the occasion-specific variance (at t = 1,2,3).
In sum, we considered identification subject to constraints on the occasion-specific residuals mentioned above.
We chose ρ = .80, so that 20%% of the phenotypic variance is occasion-specific in the standard simplex.
Using FIML estimation in Mplus, we fitted to the raw data the standard ACE simplex model, with occasion-specific residual variances constrained to be equal over time.
For parameters with an estimated value of BOV, occasion-specific parameters from the last known occasion were used for prediction of the next concentration.
This is usually solved by fixing these to zero (e.g., σ[a1] = σ[aT] = 0; same applies to the environmental occasion-specific variances), or by equating the variance components at occasions 1 and 2, and at occasions T − 1 and T (e.g., σ[at] = σ[at+1], where t = 1 or t = T − 1; same applies to the environmental occasion-specific variances).
The total χ, given NMZ = NDZ = 1000, is broken down into the MZ and the DZ contributions, respectively The 68 df model is the standard AE simplex with occasion-specific variances σ[at] = 0 & σ[et] = 0.
