We analyze vertical product differentiation in a model where a good's quality is unobservable to buyers before purchase, a continuum of quality levels is technologically feasible, and minimum quality is supplied under competitive conditions. After purchase the true quality of the good is...

Foreword -- Definitions -- -- Summary -- The Product Environmental Footprint PEF -- Introduction and the aim of the report -- Material and methods -- Three analyses about eco-design tools and the relations between the PEF/OEF and the Nordic Swan Ecolabel -- References -- The past challenges of...