Following the 2007-09 Global Financial Crisis many countries have changed their financial supervisory architecture by increasing the involvement of central banks in supervision. This has led many scholars to argue that financial crises are an important driver in explaining the evolution of the role of central banks as supervisors. We formally test this hypothesis employing a new database that captures the full set of supervisory reforms implemented during the period 1996-2013 in a large sample of countries. Our findings support the view that systemic banking crises are important drivers of reforms in supervisory structure. However, we also highlight an equally important peer effect, namely a tendency of countries to reform their financial supervisory architecture when others do so as well. We construct several measures of spatial spillover effects and show that they can explain institutional similarities among countries and impact the probability of reforming the role of the central bank in financial sector supervision.

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What explains the worldwide changes in central bank design over the past five decades? Using a new dataset on central bank institutional design, this paper investigates the timing, pace and magnitude of reforms in a sample of 154 countries over the period 1972-2017. I construct a new dynamic index of central bank independence and show that past levels of independence, as well as regional convergence, represent important drivers of changes in central bank design. An external pressure, such as obtaining an IMF loan, or political events, such as democratic reforms and the election of nationalistic governments, also impact the reform process. Reforms also follow periods of high inflation rates suggesting an endogeneous evolution of central bank independence. The results also reveal important heterogeneities in the reform process depending on the level of development, the size and direction of reforms, as well as the different dimensions along which central bank legislation can be amended.

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