Understanding the behavior of users online is important for researchers, policymakers, and private companies alike. But observing online behavior and conducting experiments is difficult without direct access to the user base and software of technology companies. We introduce Webmunk, an...

Studies of intermediated arbitrage argue that bank balance sheets are an important consideration, yet little evidence exists on banks' positioning in this context. Using confidential supervisory data (covering $25 trillion in daily notional exposures) we examine banks' positions in connection...

When labour market competition is imperfect, positive industry (and firm) productivity shocks can be passed through to workers in the form of higher wages. We document how the UK auto industry, following a period of decline, experienced a four-decade-long productivity boom. There was a...

While the importance of innovation to economic development is widely understood, the conditions conducive to it remain the focus of much attention. This volume offers new theoretical and empirical contributions to fundamental questions relating to the economics of innovation and technological...

This paper examines the impact of a reform aimed at expediting graduation times in Italian universities by reducing the number of exams students must pass to obtain a fixed number of credits. Using event-study estimates that leverage the reform's staggered implementation, we find that this...

A recent critique of using teachers' test score value-added (TVA) is that teacher quality is multifaceted; some teachers are effective in raising test scores, others are effective in improving long-term outcomes. This paper exploits an institutional setting where high school teachers are randomly...

We assess the business provisions of the 2017 Tax Cuts and Jobs Act, the biggest corporate tax cut in US history. We draw five lessons. First, corporate tax revenue fell by 40 percent due to the lower rate and more generous expensing. Second, firms with larger declines in their effective tax...

The vast majority of U.S. inventors work for firms that also have inventors and plants in other tech clusters. Using merged USPTO-U.S. Census Bureau plant-level data, we show that larger tech clusters not only make local inventors more productive but also raise the productivity of inventors and...

We expand the analysis of cyclical changes in labor demand by decomposing changes along the intensive margin into those in days/week and in hours/day. Using large cross sections of U.S. data, 1985-2018, we observe around 1/4 of the adjustment in weekly hours occurring through changing days/week....

We propose a new tool to filter non-linear dynamic models that does not require the researcher to specify the model fully and can be implemented without solving the model. If two conditions are satisfied, we can use a flexible statistical model and a known measurement equation to back out the...