Profile

• Principal Scientist, Department of Child Health, Netherlands Organisation for Applied Scientific Research (TNO)
• Professor of Statistical Analysis of Incomplete Data, Department of Methodology and Statistics, Utrecht University

Expertise

• MICE and incomplete-data methodology
  
• D-score for early child development
  
• JAMES: Joint Automatic Measurement and Evaluation System
  
• R package development

Interests

• MICE
  Inventor of the MICE algorithm for multiple imputation of missing data, a widely used framework for handling incomplete datasets. My work focuses on advancing the methodology, improving practical implementations, and broadening its scope of applications.

• Child Growth and Development
  Developer of growth charts for the Dutch child health care system and creator of the D-score, a quantitative metric for early child development. I collaborate with the World Health Organization, the Gates Foundation, and numerous academic and global-health partners to promote evidence-based developmental assessment worldwide.

• JAMES
  Lead developer of JAMES, an integrated software system for automated measurement and evaluation of individual growth and development. JAMES includes modules for growth charts, D-scores, and next-generation developmental charts.

• R Packages
  Author and maintainer of several widely used R packages, including

  • mice for multiple imputation
    
  • dscore for computing D-scores
    
  • james for implementing the JAMES framework

  I am also the founder of the GitHub organizations amices, D-score and growthcharts supporting open and reproducible research in statistical methodology and child development.