In 1978, Roger Koenker and Gilbert Bassett, Jr. introduced a new econometric estimation method and entitled it quantile regression. Since then, many subsequent authors have elaborated and extended the underlying theoretical framework. Other contributions have successfully applied the procedure...

Conspicuous consumption of luxuries plays a central role in the work of Thorstein B. Veblen. More recently, interpersonal effects have emerged as an important factor in consumption theory. However, the inadequate modelling of individuals interaction often leads to questionable results with...