“…On the one hand, some empirical studies suggest that split control harms the correct functioning of the government, by lowering legislative productivity (although not all agree, see, e.g., Mayhew 2005;Binder 2004; Kirkland and Phillips 2020 and references therein), delaying budget approval (Klarner, Phillips and Muckler, 2012;Kirkland and Phillips, 2018) and reducing governments' ability to react to economic shocks (Alt and Lowry, 1994). Others, instead, find positive effects, with divided governments being more likely to implement important legislation, such as welfare and civil service reforms (Bernecker, 2016;Ash, Morelli and Vannoni, 2020). One possible explanation for why previous work presents seemingly conflicting evidence could be that providing credible exogenous variation in divided control is challenging.…”