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Why some businesses win: competitive advantage and the economics of strategy

What a fading advantage is worth

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The prompt

Illustrative numbers, fictional company. A card payment company in Poland earns economic profit (profit above the cost of capital) of PLN 50 million a year from its merchant network. A new instant payment system, free for shops, is arriving. The team expects the economic profit to fall 20 percent each year from next year. How much economic profit will it earn over five years, and how much less is that than if nothing changed?

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