The main purpose of our study is to estimate the demand equation, and by using this equation we have to forecast the … future demand. Economic theory postulates that the demand for a commodity arises from the consumers' willingness and ability … (i.e., from their desire and want for the commodity backed by the income) to purchase the commodity. So to forecast …

general. In this paper, we used the Diebold-Li interpretation to the Nelson Siegel model in order to fit and forecast the … and efficiently estimated using the Kalman filter. The results obtained for the fit and for the forecast showed that the … Kalman filter is the most suitable method for the estimation of the model, generating better forecast for all maturities when …