Instituto Nacional de Estadística
  • Type of survey: monthly continuous survey
  • Base period: 2015
  • Weight reference period: previous year 
  • Sample of municipalities: 177
  • Number of items: 479
  • Number of observations: approximately 220,000 prices per month
  • Classification: 12 groups (ECOICOP 2-digit level), 43 subgroups (ECOICOP 3-digit level), 101 classes (ECOICOP 4-digit level) and 219 subclasses (ECOICOP 5-digit level)
  • General calculation method: Laspeyres chain index
  • Collection method: personal visits to outlets, e-mail, telephone, internet and scanner data

Methodological documents