We study the effects of online content moderation on user behavior in the context of a prominent case study: the deletion of President Donald Trump's Twitter account on January 8th, 2021. We provide four key findings. First, the toxicity of tweets sent by Trump followers relative to a...

We study whether social media can contribute to hatred against minorities with a focus on Donald Trump's political rise. To establish causality, we construct an instrument for Twitter usage based on the platform's early adopters at the South by Southwest (SXSW) festival in 2007, who were crucial...

Enrico Bombieri proved that the ABC Conjecture implies Roth's theorem in 1994. This paper concerns the other direction. In making use of Bombieri's and Van der Poorten's explicit formula for the coefficients of the regular continued fractions of algebraic numbers, we prove that Roth's theorem...

The paper describes the "Halle Institute for Economic Research (IWH) Forecasting Dashboard (ForDas)". This tool aims at providing, on a non-commercial basis, historical and actual macroeconomic forecast data for the Germany economy to researchers and interested audiences. The database renders it...

The County Business Pattern (“CBP”) files contain employment and establishment counts for detailed industry codes covering all counties in the United States. The contribution of this project is to digitize, clean, and prepare the CBP files from 1946-1974. We also apply the methods developed...

Social media companies are under scrutiny for the prevalence of hateful content on their platforms, but there is scarce empirical evidence of the consequences of regulating such content. We study this question in the context of the ``Network Enforcement Act'' (NetzDG) in Germany, which mandates...

Corporate social responsibility (CSR) is a prominent topic. Researchers frequently understand CSR as the requirement for corporations to make additional contributions to the well-being of society. Accordingly, CSR is linked with the idea of “doing good.” However, beyond “doing good,”...