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The main reason for the increasing returns to scale is the increase in production efficiency due to the expansion of the firm's production scale. A firm's production function could exhibit different types of returns to scale in different ranges of output.
If the firm is a perfect competitor in all input markets, and thus the per-unit prices of all its inputs are unaffected by how much of the inputs the firm purchases, then it can be shown that at a particular level of output, the firm has economies of scale if and only if it has increasing returns to scale, has diseconomies of scale if and only ...
Economies of scale external to a firm result from spatial proximity and are called agglomeration economies of scale. Agglomeration economies can be seen as the external condition for companies and the internal condition for the region. Increasing returns to scale, according to Beckmann, is integral to understanding why urban centers form.
With increasing returns to scale, countries that are identical still have an incentive to trade with each other. Industries in specific countries concentrate on specific niche products, gaining economies of scale in those niches. Countries then trade these niche products to each other – each specializing in a particular industry or niche product.
The presence of increasing returns means that a one percent increase in the usage levels of all inputs would result in a greater than one percent increase in output; the presence of decreasing returns means that it would result in a less than one percent increase in output. Constant returns to scale is the in-between case.
A family of isoquants can be represented by an isoquant map, a graph combining a number of isoquants, each representing a different quantity of output.An isoquant map can indicate decreasing or increasing returns to scale based on increasing or decreasing distances between the isoquant pairs of fixed output increment, as output increases. [7]
The engine for growth can be as simple as a constant return to scale production function (the AK model) or more complicated set ups with spillover effects (spillovers are positive externalities, benefits that are attributed to costs from other firms), increasing numbers of goods, increasing qualities, etc. [citation needed]
If the coefficient is 1, then production is experiencing constant returns to scale. Note that returns to scale may change as the level of production changes. [2] A different usage of the term "output elasticity" is defined as the percentage change in output per one percent change in all the inputs. [3] The coefficient of output elasticity can ...