The Welfare Magnet Hypothesis: Evidence From an Immigrant Welfare Scheme in DenmarkMarch 2020, Forthcoming in the American Economic Review: InsightsThe EITC and the Extensive Margin: A ReappraisalFebruary 2020, Working PaperTechnology and Big Data Are Changing Economics: Mining Text to Track MethodsJanuary 2020, Forthcoming in the AEA Papers & Proceedings