An attempt has been made in this study to examine the consumption demand behavior in rural Bangladesh across different dynamic groups such as non-poor,descending non-poor,ascending poor and chronically poor.We have selected some factors,which are responsible for consumption expenditure.An extended version of Almost Ideal Demand system or AIDS model has been applied for estimating the demand pattern of the dynamic groups.To observe the impact of per capita monthly expenditure on the budget share the AIDS model has been extended by incorporating various household characteristics such as...