We derive exact conditions relating the distributions of firm productivity, sales, output, and markups to the form of demand in monopolistic competition. Applications include a new “CREMR” demand function (Constant Revenue Elasticity of Marginal Revenue): it is necessary and sufficient for...

The political unification of Italy in 1861 led to the establishment of a single market, by removing the trade barriers across the pre-existing states, with a single currency. Market integration was the economic outcome of this process. At the same time, the Kingdom of Italy started a large...

We study the impact of improved rail access on entrepreneurship rates in England and Wales. We use data from the Census spanning 2001, 2011, and 2021 to analyse self-employment rates in granular geographic areas of around 200 residents. Specifically, we study how they respond to changes in the...

Digital media goods and digital media platforms exhibit cost structures and network effects that imply that price and quantity effects of consumption taxes are qualitatively different compared to what we typically find for physical goods. For instance, in most European countries and US states,...

This paper investigates the impact of restrictive TBTs on firms' extensive margins (export participation and exit probability), intensive margins (export value) and pricing strategy (export price). To this end, product-level restrictive TBTs and firm-level export are combined and an...

This paper explores the effect of airline emissions charges on airfares, airline service quality, aircraft design features, and network structure, using a detailed and realistic theoretical model of competing duopoly airlines. These impacts are derived by analyzing the effects of an increase in...

Empirical evidence suggests that people dislike ads in media products like TV programs. In such situations standard economic theory prescribes that the advertising volume can be optimally reduced by levying a tax on ads. However, making use of recent advances in the theory of Industrial...