(Mara Diamond) A diversification strategy achieves growth by developing new products for completely new markets. Justice (a clothing store for young girls) introducing the Brothers line is an example. Boys are the new market and the new product is boy's clothing.
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HSchulke: Market development strategy puts an existing product into a new market. UK based brands such as Criminal Damage and BOYS were only available to UK customers via their online store. Recently a store has opened in London carrying these brands making them available to more people.