We survey the empirical literature in economics on the impact of media technologies on
social capital. Guided by a simple model of information and collective action, we cover a …

This article analyzes recent research on the newspaper crisis. It discusses how authors have
examined the sources, manifestations, and implications of this crisis, and the proposals to …

Linear regressions with period and group fixed effects are widely used to estimate policie's
effects: 26 of the 100 most cited papers published by the American Economic Review from …

Does the consumption of ideologically congruent news on social media exacerbate
polarization? I estimate the effects of social media news exposure by conducting a large …

Linear regressions with period and group fixed effects are widely used to estimate treatment
effects. We show that they estimate weighted sums of the average treatment effects (ATE) in …

We examine whether the local press is an effective monitor of corporate misconduct.
Specifically, we study the effects of local newspaper closures on violations by local facilities …

Linear panel models, and the “event-study plots” that often accompany them, are popular
tools for learning about policy effects. We discuss the construction of event-study plots and …

We study how social media affects election outcomes in the United States. We use variation
in the number of Twitter users across counties induced by early adopters at the 2007 South …

We consider a linear panel event-study design in which unobserved confounds may be
related both to the outcome and to the policy variable of interest. We provide sufficient …

We demonstrate that exposure to the news media causes Americans to take public stands
on specific issues, join national policy conversations, and express themselves publicly—all …