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Composite indicators: the INSEE’s experience

What are the composite indicators?
A composite indicator is formed when individual indicators are compiled into a single index, on the basis of an underlying model of the multi-dimensional concept that is being measured.
The indicators that make up a composite indicator are referred to as components or component indicators.
What are the advantages of composite indicators?
There is an ongoing discussion on pros and cons for using composite indicators.
The main advantages is that the indicators can summarize complex, multi-dimensional concepts in an easier way and make it easier to compare country performance over time.
The function of a single indicator is to assign units of analysis to categories or levels of a variable.
The purpose of a composite measure is exactly the same, but is used when a single indicator won't do the job.
Composite measures are based on more than one data item.

What are the composite indicators?