An approach is offered that lets data determine the exact location of seasonal cycles. Rather than use deterministic variables that define the season, it allows seasonal cycles to be identified and modelled as dictated by the data in demand modelling framework.

It is widely recognized that purchases of perishable agricultural products are affected by the seasonal cycles of production. When there are seasonal effects where seasonal buying is not explained by prices alone, the seasonal component can be captured using appropriate dummy variables in a...

Price competition is a fundamental assumption in modeling trade. Empirical applications often use unit values as proxies for price. This is a problem if unit values cannot explain trade flows consistent with the price competition assumption. The paper determines whether this condition exists in...

Error correction models impose few prior restrictions on dynamic model specification and allow the data to determine model structure. Despite this obvious advantage, few applications have adopted the error correction model to explain trade flows. An error correction model of cotton import demand...

This study identifies consumer welfare from new brand introductions in the potato chip market. Price and variety effects of new brand introduction are measured by estimating a demand system underlying an expenditure function. Variety effects are positive in most cities, while price effects are...