Role of agricultural research and extension in enhancing agricultural productivity in Punjab,Pakistan

In this study long run relationship between agricultural research and tfp (total factor productivity) was estimated by using co-integration technique for 1970- 2005. the results of the long run relationship between tfp and agricultural research indicated that agricultural research had a significant and positive impact on tfp. the estimated coefficient of research was 0.571 and it was significant at 1 percent level of significance. granger-causality tests showed a bidirectional relationship between research and productivity. the estimate of marginal internal rate of return (mirr) to research was found to be 73 percent,indicating that punjab agricultural research system remained productive.