If a firm triples inputs and produces twecreasing returns to scale may occur because increasing the amount of inputs used Decreasing returns to scale may occur because increasing the amount of inputs used increases efficiency. always increases the amount of output produced. increases specialization. may cause coordination difficulties.ice the output, then there are If a firm triples inputs and produces twice the output, then there are decreasing returns to scale. increasing returns to scale. diminishing marginal product. constant returns to scale