Population and its growth have been regarded as the major driving force of carbon dioxide emissions,while the effects of household dynamics on carbon dioxide emissions have been largely neglected.In this paper,a multi-variable model(VAR) is built in which the dynamic effects among population,household and carbon dioxide emissions are analyzed through impulse response function method(IRF).A variance decomposition technique is adopted to investigate the differences and relative importance of their effects.The results show that the variables representing household dynamics have stronger explanatory power than that of the total population.Family size effect on carbon dioxide emissions is greater than the effect of household numbers,which in turn is greater than the population effect.Therefore,sustainable patterns of family household should be advocated in the policy-making of energy conservation and emission reduction.Household reduction of emission would have a larger potential to meeting the reduction goals.

Based on the theory of Public Choice,the paper analyzes the factors and decision-making mechanism influencing the management system of floating population,points out that the management system of floating population depends on the game from a lot of stakeholders especially among the various government departments under the premise of the cost.In effect,the reform of floating population management system in China lies in the change of government behavioral patterns.