Surmising Consumer Demand System & Structural Changes Using Time Series Data

Consumer demand for food and non-food items in Pakistan has attracted the attention of various researchers. They have employed different parametric approaches, like single equation, double log models, linear expenditure system and extended linear expenditure system. Most of the studies were based on household income and expenditure survey data. Like other household surveys, HIES data do not give information about prices, due to which price elasticities could not estimated. This task could not be accomplished partly because, in order to examine the existence and the nature of structural change and estimation of price elasticities, time series data was required.