“…In seminal papers, Bartik (1991) and Blanchard and Katz (1992) use shift-share strategies to analyze the impact on local labor markets of shifters measured as changes in national sectoral employment. More recently, shift-share strategies have been applied to investigate the local labor market consequences of various observable shocks, including international trade competition (Topalova, 2007(Topalova, , 2010Kovak, 2013;Autor, Dorn and Hanson, 2013;Dix-Carneiro and Kovak, 2017;Pierce and Schott, 2017), credit supply (Greenstone, Mas and Nguyen, 2015), technological change (Acemoglu andRestrepo, 2017, 2018), and industry reallocation (Chodorow-Reich and Wieland, 2018). Shift-share regressors have also been used to study the impact of the same shocks on other outcomes, such as political preferences (Autor et al, 2017a;Che et al, 2017;Colantone and Stanig, 2018), marriage patterns (Autor, Dorn and Hanson, 2018), crime levels (Dix-Carneiro, Soares and Ulyssea, 2017), and innovation (Acemoglu and Linn, 2004;Autor et al, 2017b).…”