1994
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Jean Lesquins, « Innovation et délimitation des marchés pertinents », Revue d'économie industrielle (documents), ID : 10.3406/rei.1994.1544
Which approach should be used to determine whether innovative products are part of an already existing market ? According to traditional analysis, the key criterion is substitutability of demand. This implies identification of reversible substitution between products coexisting lastingly on the market by observing cross-price elasticities of demand. This analysis can no longer be used when a product is replaced with another : it can not be concluded that both are necessarily on the same market throughout the process. However, it is equally impossible to conclude the reverse because their coexistence is not lasting and the only cross-elasticities which are observed are asymmetrical. Hence, within limits it is necessary to improve the flexibility of traditional analysis criteria.