For a firm in a perfectly competitive product market,the marginal resource cost curve is likely to be horizontal if the resource market is also competitive.

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In a perfectly competitive product market, firms are price takers and the price of resources is determined by the market. If the resource market is also perfectly competitive, then the price of resources will be constant for the firm regardless of how much it chooses to hire. Therefore, the marginal resource cost curve will be horizontal as it represents the additional cost to the firm of hiring an additional unit of a resource, which will not change as the firm increases the quantity of resources it hires.

For a Firm in a Perfectly Competitive Product Market,the Marginal