Several recent papers have used annual changes and monthly data to estimate demand systems. Such use of overlapping data introduces a moving average error term. This paper shows how to obtain consistent and asymptotically efficient estimates of a demand system using seasonally differenced data....

Includes cover page, journal info, contents page, and editorial information

Reliable information about animal product consumption in China is extremely important for policy formulation and marketing activities. However, publications by China's State Statistical Bureau underestimate animal product consumption. Such underestimated statistics affect policy making and...

Most fresh fruits and vegetables are unbranded. However, buyers are assisted with brands when purchasing most other grocery products. Brands have the potential to be of value to buyers and to the organisations that own them. However, research has shown that brands are only valuable to buyers...