Definition: Class-confined seasonal weights index
Means a price index using weightings that within the same year:
- do not differ between months for any COICOP/HICP subdivision taken as a whole,
- do not differ between months for products within any COICOP/HICP subdivision that does not contain any seasonal product,
- within the in-season period do not differ between months for products within any COICOP/HICP subdivision that contains seasonal products, except to the extent that it is necessary to allow for month-on-month changes in the composition of the basket.
European Union, Commission Regulation (EC) No 330/2009 of 22 April 2009 laying down detailed rules for the implementation of Council Regulation (EC) No 2494/95 as regards minimum standards for the treatment of seasonal products in the Harmonised Indices of Consumer Prices (HICP)