This paper extends the analyses by Silberberg (1985) of the relationship between the expenditures for food to satisfy nutritional requirements and the expenditures to satisfy the desire for tastes using alternative estimates of the minimum cost or technically efficient diet. The hypothesis...

The change of Balassa's 'revealed comparative advantage' index is often directly used to measure comparative advantage variation over time, yet the theoretical foundation of this traditional measure has not been clarified. In this article we derive a 'revealed comparative advantage variation'...