the study of effective factors on the level of bank deposits (emphasizing on the rate of profit sharing securities 1988 - 2008)

in economic literature, one of the important roles of deposits is to provide a suitable background for investing. the basic aim of this research is to study the mechanism of some variables such as; inflation rate, gross domestic product (gdp), stock price index, housing price index, the rate of profit sharing securities and their effects on the level of bank deposits in current banking system. considering this explanting the present article is seeking to answer these questions: first; what are the relations among the rate of profit sharing securities and the level of bank deposits as well as gdp and other variables and the level of bank deposits? second; how may the bank deposits and consequently the investment be increased? this paper use autoregressive distraction lags approach to examine the effect of any variable separately. in addition, the error correction model is applied to link short-time variables fluctuation to long-term rates. the results of this research show that there is a negative relation between the rate of profit-sharing securities and bank deposits level and a positive relation between gdp and bank deposits level.