質的技術進歩のミクロ経済モデル

概要

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A premise of the model studied in this paper is that commodities are valuable because they possess qualities which consumers desire. This assumption makes it possible to specify the model by describing the degree of a desirable quality. How does a technological change in quality relate to a firm's production function? We can view the fact that the production function changes with a high quality product. Not to mention, a modern firm supplies many different products one after another through technological progress in quality. The function (2) denotes a continuous production of products with different degree of quality. A rise in quality will lead to three situations, that is to say, arising of new product, capacity change of production factors and a change of parameter δ. Especially, it is important that a rise in quality brings a change of the amount of materials in initial product y. As a result, a change of the measure in y should be accepted as valid. In Figure (1), the area covered with net represents the amount of materials in y. What is the y in τy? It is a imaginary product, in other words, measurement converter, without any quality. An increase in product quality may induce upward shift of the demand curve. Through the ordinary analysis, we shows that the firm can not realize overall profit maximization.
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