providing transfer function for the population model

solve complex social and humanitarian issues has long been dream of scientists and researchers. and the most important tool for there issues is simulation. we tried combine several different simulation methods for population transfer function. note that the transfer function in the field of humanities is considered as low. hence another reason for us to offer combine different simulation methods. in first step,  we provide a population model based on the stock-flow diagram (system dynamic) and then, transfer this model to block diagram model in matlab. finally, we calculation transfer function and compared the step response of three methods . we hope that the hybrid approach , be considers in the field of humanities.