Uncertainty

Uncertainty

1. Variability

   • Temporal
   • Individual heterogeneity
   • Spatial
   • Biological

2. Sampling errors

   • Adjustment
   • Frame
   • Coverage
   • Selection
   • Size

3. Non sampling errors

   • Response errors
     • Respondent error
       • Unwillingness
       • Inability
       • Non response
       • Falsification
       • Misrepresentation
     • Interviewer error
       • Falsification
       • Recording
       • Questioning
       • Respondent selection
       • Coverage
   • Researcher errors
     • Processing errors
       • Weighting
       • Computation
       • Editing
       • Imputation
       • Excluded variables
       • Coding
     • Population specification
     • Surrogate information
     • Measurement
     • Classification

4. Model

   • Projections
   • Assumed distribution
   • Abnormal situations
   • Surrogate variables