27.9 Using the ODP Bootstrap Model: A Practitioner’s Guide - Shapland

Model Parameters:

• Mean (9.1)

• Variance (9.3) and dispersion factor

  • Need residual: unscaled (9.8), scaled (9.9), standardized (9.10)

\(\star\) Simulation procedure

• Parameter variance (9.14)

• Process variance (9.15)

\(\star\) Practical issues:

1. \(\star\) Negative Incremental Values

   • During fitting: (9.16) and (9.17)

   • During simulation: (9.21)

2. \(\star\) Heteroscedasticity

   • Stratified sampling

   • Hetero adjustment to residuals

   • Non-constant scale parameter