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Pitää laittaa tämä ajatus nopeasti muistiin, ennenkuin katoaa:
"If supply tai demand-side changes affect cost/price changes in different areas, they those areas can be regarded as one.
Areas can be geographical areas as in a) industry analysis or b) when thinking centralization vs. de-centralization decisions.
In industrial analysis one can start from buyer substitutability. If products are substitutes for a buyer, they can be seen to belong to a same industry."
Ugh.
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