Longitudinal Data

{
  "id": "MLC-T-ENV-016026",
  "term": "Longitudinal Data",
  "field": "Environment",
  "definition": "1. Observations collected over a period of time; the sample (instances or cases) may or may not be the same each time but the population remains constant.\n\n2. Observations collected over a period of time. The sample (instances or cases) may or may not be the same each time but the population remains constant. Longitudinal data are sometimes called \"time series data.\" (GAO, Designing Evaluations 1991, p. 92)\n\n3. Sometimes called \"time series data,\" observations collected over a period of time; the sample (instances or cases) may or may not be the same each time but the population remains constant.",
  "synonyms": [
    "Time-series Data"
  ],
  "subject": "Policy and guidance",
  "references": [
    "Program Evaluation Glossary",
    "DOE Energy Efficiency and Renewable Energy Program Evaluation Glossary"
  ],
  "url": "https://mlchart.com/terminology/environment/longitudinal-data/"
}