정보통신산업 공공 연구개발(R&D)투자의 파급효과 분석

We investigate the effect of government and public sector R&D investment at IT industry on the amount of production, export and nongovernment R&D investment at IT industry. We, firstly, examine the stationarity of each variable by the unit root t-test and perform the co-integration test for the pairs of variables. We use VECM(Vector Error Correction Model) according to the results of co-integration test for the examination of Granger-causality between variables. It is found that there exist an Granger-causality between public sector R&D investment and nongovernment R&D investment and also between public sector R&D investment and export. Secondly, we analyze the impulse response of government and public sector R&D investment at IT industry on the amount of production, export and nongovernment R&D investment at IT industry based on VECM model. It is found that the response of the amount of production is highest at 3th period and is lowest at 8th period and that of export shows similar pattern.