Firms use both innovation and advertising to increase their profits, markups, and market shares. While they serve the same purpose from the firms' perspective, their broader implications vary substantially. In this paper, we study the interaction between these two intangible inputs and analyze...

We develop a method for estimating the stock market impact of aggregate events. Based on using data on both stock and options prices, our technique accounts for two important sources of bias present in traditional methods. First, our method takes into account market anticipation, without the...

To shed light on the dynamic effects of antitrust policy on growth and welfare, we develop and estimate the first general equilibrium model with Schumpeterian innovation, oligopolistic product market competition, and endogenous M&A decisions. The estimated model reveals that: (1) Existing...

An active M&A market incentivizes many firms to specialize in innovation with the anticipation of being acquired in the future. Acquiring innovation, however, is subject to information frictions, because acquirers often find it challenging to assess the value and impact of innovative targets....

Since the 1970s, there have been significant changes in firm dynamics within and across industries in the US. Industries are increasingly dominated by a small number of large firms ("superstars"). Markups, market concentration, profits, and R&D spending are increasing, whereas business dynamism,...

An endogenous growth model is developed where each period firms invest in researching and developing new ideas. An idea increases a firm's productivity. By how much depends on how central the idea is to a firm's activity. Ideas can be bought and sold on a market for patents. A firm can sell an...

An endogenous growth model is developed where each period firms invest in researching and developing new ideas. An idea increases a firm's productivity. By how much depends on how central the idea is to a firm's activity. Ideas can be bought and sold on a market for patents. A firm can sell an...

An endogenous growth model is developed where each period firms invest in researching and developing new ideas. An idea increases a firm's productivity. By how much depends on how central the idea is to a firm's activity. Ideas can be bought and sold on a market for patents. A firm can sell an...