estimating the time series of knowledge level for iranian economy (1974-2013)

research and developmentexpenditure (r&d;) in new literature plays an important role in economic growth. investment in r&d;, increases level of knowledge and enhanced knowledge, increase production efficiency and from efficiency channel economic growth improves. many studies have been done on the r&d; not used unit of data for this variable. this is due to a lack of labor and the level of investment in r&d; (because of the complexity of calculations and measurements of this invisible variable).in this study, the series of capital and labor at different periods in the r&d; was calculated and then the level of knowledge is considered as an unobservable variable in the production. we develop a multi objective recursive algorithm and estimated the level of knowledge series value during 1974-2013.these calculations by the authors can be very important for future studies in field of r&d.; it should be noted that all the programming of recursive algorithm developed by the authors in matlab software. and can be expanded for different countries. research and developmentexpenditure (r&d;) in new literature plays an important role in economic growth. investment in r&d;, increases level of knowledge and enhanced knowledge, increase production efficiency and from efficiency channel economic growth improves. many studies have been done on the r&d; not used unit of data for this variable. this is due to a lack of labor and the level of investment in r&d; (because of the complexity of calculations and measurements of this invisible variable).in this study, the series of capital and labor at different periods in the r&d; was calculated and then the level of knowledge is considered as an unobservable variable in the production. we develop a multi objective recursive algorithm and estimated the level of knowledge series value during 1974-2013.these calculations by the authors can be very important for future studies in field of r&d.; it should be noted that all the programming of recursive algorithm developed by the authors in matlab software. and can be expanded for different countries.