Lightweight design is regarded as a technological approach to engineer products in a more energy and material efficient- and, therefore, resource-saving way. In this sense, high-tech multi-materials, also referred to as composites, have become very popular for many decades due to their...

This paper develops a two-country, general equilibrium model of oligopoly in which the degree of horizontal product differentiation is endogenously determined by firms strategic investments in product innovation. Consumers seek variety and product innovation is more skill intensive than...

We develop a product-differentiated model where the product space is a network defined as a set of varieties (nodes) linked by their degrees of substitutability (edges). We also locate consumers into this network, so that the location of each consumer (node) corresponds to her "ideal" variety....