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<p>into a commodity (its "marketing") is in reality not a simple process, but has many technical and social preconditions. These often include:<br/>
* the existence of a reliable supply of a product, or at least a surplus or <a href="page.php?w=surplus_product">surplus product</a>;<br/>
* the existence of a social need for it (a market demand) that must be met through trade, or at any event cannot be met otherwise;<br/>
* the legally sanctioned assertion of private ownership rights to the commodity and the right to trade it;<br/>
* the enforcement</p><p>
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