The effects of Government R&D subsidies on Private R&D investment - The case of Korean industry after 2000 -

정부 연구개발 보조금의 기업자체 R&D투자에 대한 효과 분석 - 2000년 이후 국내기업 사례를 중심으로 -

This study attempts to empirically investigate the effects of government R&D subsidies on private firm's R&D investment in Korean industry. The R&D subsidy effect is defined as the average percentage change in firm's R&D expenditures between what was actually observed among firms that received a subsidy and what these firms would have spent had the subsidy not been received. To measure the effect we use Difference-in-Differences (DID) model which sign as to whether the relationship between government subsidies and private R&D investments is on stimulating or displacing private R&D expenditures. The differences between this study and previous studies are that we tries to measure the effect of Government R&D across various sited firm groups such as large, small & medium, and venture firms and we add one lag of the subsidy indicator in order to capture the effect of the subsidies on private R&D during 2 consecutive period. Empirically, a firm with government R&D subsidy increases its own R&D investment by 13.9%. Also on average, 1% of government R&D subsidy leads to 0.031% of private R&D increase. The main results of this study are as follows : First, Government R&D subsidies stimulate private firm's R&D expenditures. Second, Government R&D subsidies greatly increase (statistically significant) company financed R&D expenditures only for large firms but had no effect on the R&D expenditures of small & medium sized firms and venture firms.

이 논문은 2000년 이후 R&D분야의 정부 연구개발 직접보조금이 기업의 연구개발 투자를 진작 또는 대체 시키는지 여부 및 기업유형별 정부의 보조금 효과가 달라지는가에 대해 Difference-in-Differences (DTD) 모형을 이용하여 실증적으로 분석하였다. 그 결과 정부의 연구개발 보조수혜는 기업 연구개발 투자를 평균적으로 13.9%증가시키는 보완적 효과가 있는 것으로 나타났으며, 보조금의 액수가 1% 증가할 때 기업의 자체개발 연구비는 평균적으로 0.031% 증가하는 것으로 나타났다. 기업유형별로는 대기업의 경우 보다 강력한 보완효과가 나타났으나 벤처기업이나 중소 기업의 경우는 정부보조금지원이 연구개발비 확대를 초래했다는 실증적 증거를 발견하지 못하였다.