Inputs accumulation or productivity: which factor is the leading contributor to economic growth in Iran?

In this study, we attempted to determine the key factors leadingto economic growth for iran economy over the period 1960-2006.in particular, we sought to clarify whether the growth of iran wasdriven mainly by factor accumulation or by improvements inefficiency namely, debate of k (factor accumulation) versus a(productivity gains). the analysis of the sources of growth showsthat the role of total factor productivity (tfp) in determiningeconomic growth is insignificant and often detrimental. most ofthe growth is due to the accumulation of physical capital andimprovements in the quality of labor. thus, we conclude that inthe debate of a versus k we take the side of k. bases on theexperiences of iran as a oil dependent country, accumulation ofcapital seems to be the major determinant of economic growth.