Consumer Price Index (CPIx)

Source details

Training Program title: Consumer Price Index (CPIx)
Session No.: OL 26.121
Location: Course conducted online
Date: May 1, 2026 - April 15, 2027 (50 weeks)
Delivery Method: Online Training
Primary Language: French
Target Audience: Compilers of consumer price indexes (CPIs) and users of CPI data interested in understanding key concepts and compilation issues.
Qualifications: Some knowledge of economics and statistics or equivalent experience in CPI is helpful.

Provides an overview of key CPI concepts, methods and uses.
Covers different index number formulas and the practical implications of choosing the index number formula at lower and higher levels of aggregation.
Discusses sources and methods for sampling:
- sampling areas,
- sampling items,
- sampling outlets,
- sampling varieties.
Treats methods for handling missing prices:
- treatment of temporarily missing prices,
- treatment of permanently missing prices,
- adjusting prices for quality changes.
Addresses updating and linking CPI data series, including chaining and linking indexes with updated weighting structures.
Highlights linkages to the 2025 SNA, including the related principles of scope, coverage, and valuation.
Follows the principles and recommendations of the CPI Manual (2020).

Defining key CPI concepts, uses, and their impact on the CPI design.
Meeting data users' needs to ensure relevancy.
Calculating elementary and upper-level indexes; methods for sampling areas, items, outlets, and varieties.
Methods for handling temporarily and permanently missing prices, including adjusting prices for quality changes.
Chaining and linking indexes with updated weighting structures.

Upon completion of the course, participants should be able to:

Identify key uses of CPI data and explain key CPI concepts and definitions.
Identify and explain differences between index calculation formulas.
Define and explain the different levels of sampling in a CPI and how sampling methods are applied in practice.
Identify and explain the different methods for the treatment of missing prices and describe how these are applied in practice.
Update CPI weights and link old and new indexes to form continuous time series of data.