This paper presents an analysis of expenditure on food of households in Poland in the years 1999-2010. Since their level and dynamics can be used as a measure of well-being of society this process was used to examine internal social convergence of regions, in this case the voivodeships. The aim...

This paper presents an analysis of expenditure on food of households in Poland in the years 1999-2010. Since their level and dynamics can be used as a measure of well-being of society this process was used to examine internal social convergence of regions, in this case the voivodeships. The aim...

In the first part of article the theory of product lifecycle were presented. Then the main features of e-commerce which have the influence on lengthening the product lifecycle were analysed. In the next part of article the results of undertaken research about relationship between the age of...