We know that the LRAC curve eventually slopes upward because of diseconomies of scale. Also, the SRATC curve eventually slopes upward because of diminishing marginal product of the variable factor. a. Explain the difference between diseconomies of scale and diminishing marginal product of the variable factor. Why is one a short-run concept and the other a long-run concept? In the table below match each concept on the left with one choice from the list on the right. Do this by inserting the choice number in the appropriate box. Diseconomies of scale 1. Total cost associated with increases in the scale of a firm's operations. 2. An outcome implied from the fact that output increases less than in proportion to inputs as the scale of a firm's operations increases. Diminishing marginal 3. Increases in a variable factor of production result in decreasing output. product of the variable 4. Increases in a variable factor of production result in decreasing increments of factor output. 5. Decreases in the scale of a firm's operations diminish its overall efficiency