An estimation of import demand, export supply and technical change for Korea

Abstract

This paper estimates import demand and export supply functions for Korea based on the translog restricted profit (or GNP) function. It also estimates biases of technological change and applies decomposition analysis to examine the effects of technical change on input demand within the profit function framework. Our findings show that (a) factor inputs, as well as outputs, are, in general, moderately price-elastic and substitutable among each other. (b) the production of investment goods, as well as export goods, is capital-intensive while the production of consumption goods is labout-intensive, (c) technical change is labour-saving and is biased against imports, and (d) there has been a rapid decline of export supply price-elasticity which may be attributable to the rapid growth of export share of GDP (from 4% in 1964 to 38% in 1983). The larger the relative size of export sector and the faster the rate of its growth, the harder will it be to expand export production by drawing own resources from the domestic sector.

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