The Long Run Relationship Between

Increasing total productivity of factors is an issue of upmost concern for economists in economic growth process. Recent developments in the theory of neoclassical economic growth identify knowledge as an important contributing factor to productivity growth. This paper examines the long-run relationship between variables contributing to knowledge and economic growth in Iran during 1968- 2007. We use the Johansen method of co-integration and the error correction (VEC) model. The results show the existence of a long-run equilibrium relationship between economic growth and variables representing knowledge in the Iranian economy and also the positive effect of all these variables on the economic growth. In addition, coefficient of ECM is negative and small, implying slow adjustment towards the long-run equilibrium level.