1 ) A method of forecasting commodity consumption by an individual within a population, the method comprising: a) deriving at least one population commodity consumption forecasting model from population historical consumption data; b) for at least one individual of the population, deriving an individual commodity consumption forecasting model from said at least one population commodity consumption forecasting model and from individual historical consumption data; and c) forecasting future individual commodity consumption for said individual using said individual commodity consumption forecasting model.