Industries with significant scale economies or learning-by-doing may come to be dominated by a single firm. Economists have studied how likely this is to happen, and whether it is efficient, using models where buyers are price or quantity takers, even though these industries are often also...

Recycling of raw material can make a significant contribution to achieving climate neutrality by 2050. Carbon pricing can encourage material recycling by making it more competitive with waste incineration and primary material production. However, accounting for the interactions among different...