demand-side substitutability
C2CEFR level
93/100Rarity: very rare
TechnicalRegister
The extent to which customers would switch to alternative products in response to a price rise, central to market definition.
Weak demand-side substitutability meant the two formats belonged to separate relevant markets.
Rarity runs from 0 (a word everyone knows) to 100 (almost never seen outside specialist or literary writing). Level is the word's real difficulty on the CEFR scale, from A1 to C2.
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