제조업 산업별 IT 투자 효과 및 동태적 효율성 분석 = The Effect of IT Investment and Dynamic Efficiency Test in Manufacturing Industries

다국어 초록 (Multilingual Abstract)

The previous studies have mainly focused on measuring the contribution of
IT investment to the industry's productivity growth, but failed to investigate its effect on the supply price. If IT investment leads to a lower in the supply price, the industry will likely expand its global market share through the price competition. Also, it is required to confirm the attainment of optimal level of IT capital stock in order to maximize the investment efficiency. In this study, first, we compute the price elasticities with respect to IT capital investment by industries by estimating a supply relationship derived from the cost function. Then we test for the dynamic optimal condition for IT capital stock obtained by minimizing the present value of costs subject to the production function as
specified in dynamic equilibrium model. An investment in IT capital would bring an increase in supply price in the labor intensive industries, while enabling the price cuts in the capital intensive industries. Overall, the IT investment might result in the supply price reductions in the Korean manufacturing industries, but insignificantly in the effectiveness. The dynamic optimal condition is rejected for feasible range of variable discount rates.

국문 초록 (Abstract)

산업의 IT 투자 효과를 측정한 기존 연구 대부분은 주로 생산성 향상
여부에 논의의 초점을 맞추어 그 기여도를 분석하였으나 공급가격의 인하를 통한
수출 경쟁력 확보 및 세계시장 점유율 제고의 개연성여부까지는 이어지지 못하였다. 또한 IT 투자에 많은 비용이 들어가는 만큼 투자효율을 극대화하기 위하여 IT
자본스톡의 적정수준 여부를 판단하는 작업이 선행되어야 한다. 본 연구에서는
한국 제조업을 대상으로 비용함수로부터 공급관계식을 도출하고 산업별 IT 자본
투자에 대한 공급가격의 탄력성을 측정하며, IT 자본 스톡의 절대 변화율에 영향을
받는 동태적 균형모형에서의 비용함수로부터 최적 조건을 도출한 다음 그 충족여부를 검증한다. 노동집약적 산업에서의 IT 투자는 공급가격을 증가시키는 것으로 나타난 반면 자본집약적 산업에서는 가격인하가 가능한 것으로 밝혀졌다. 제조업 전체로 보면 IT 자본 투자로 공급가격은 하락하되 그 폭은 작았다. IT 자본 투자의 동태적 효율성 달성은 모든 변동할인율 범위에서 기각되었다.

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