Calculate posterior modes and credible intervals of parameters of the Dixon-Simon model for subgroup analysis (with binary covariates) in clinical trials. For details of the methodology, please refer to D.O. Dixon and R. Simon (1991), Biometrics, 47: 871-881.

The D-score summarizes a child's performance on developmental milestones
    into a single number. Its key feature is its generic nature. The method
    does not depend on a specific measurement instrument. The statistical
    method underlying the D-score is described in van Buuren et al. (2025)
    <doi:10.1177/01650254241294033>. This package implements model keys to
    convert milestone scores to D-scores; maps instrument-specific item names
    to a generic 9-position naming convention; computes D-scores and their
    precision from a child's milestone scores; and converts D-scores to
    Development-for-Age Z-scores (DAZ) using age-conditional reference
    standards.

Implements survival proximity score matching in multi-state survival models. Includes tools for simulating survival data and estimating transition-specific coxph models with frailty terms. The primary methodological work on multistate censored data modeling using propensity score matching has been published by Bhattacharjee et al.(2024) <doi:10.1038/s41598-024-54149-y>.

The models of probability density functions are Gaussian or
    exponential distributions with polynomial correction terms.
    Using a maximum likelihood method, 'dsdp' computes parameters of Gaussian
    or exponential distributions together with degrees of polynomials by
    a grid search, and coefficient of polynomials by a variant of semidefinite
    programming. It adopts Akaike Information Criterion for model selection.
    See a vignette for a tutorial and more on our 'Github' repository 
    <https://github.com/tsuchiya-lab/dsdp/>.

Applies dynamic structural equation models to time-series data
	with generic and simplified specification for simultaneous and lagged
	effects. Methods are described in Thorson et al. (2024)
	"Dynamic structural equation models synthesize ecosystem dynamics 
	constrained by ecological mechanisms."