https://pure.iiasa.ac.at/id/eprint/14429 2021-08-27T17:41:49Z info:eu-repo/semantics/descriptiveMetadata https://pure.iiasa.ac.at/id/eprint/14429/ Basel III capital surcharges for G-SIBs are far less effective in managing systemic risk in comparison to network-based, systemic risk-dependent financial transaction taxes Poledna, S. Bochmann, O. Thurner, S. In addition to constraining bilateral exposures of financial institutions, there exist essentially two options for future financial regulation of systemic risk: First, regulation could attempt to reduce the financial fragility of global or domestic systemically important financial institutions (G-SIBs or D-SIBs), as for instance proposed by Basel III. Second, it could focus on strengthening the financial system as a whole by reducing the probability of large-scale cascading events. This can be achieved by re-shaping the topology of financial networks. We use an agent-based model of a financial system and the real economy to study and compare the consequences of these two options. By conducting three computer experiments with the agent-based model we find that re-shaping financial networks is more effective and efficient than reducing financial fragility. Capital surcharges for G-SIBs could reduce systemic risk, but they would have to be substantially larger than those specified in the current Basel III proposal in order to have a measurable impact. This would cause a loss of efficiency. Elsevier 2017-04 Article PeerReviewed text en cc_by https://pure.iiasa.ac.at/id/eprint/14429/1/Basel%20III%20capital%20surcharges%20.pdf Poledna, S. <https://pure.iiasa.ac.at/view/iiasa/235.html>, Bochmann, O., & Thurner, S. <https://pure.iiasa.ac.at/view/iiasa/307.html> (2017). Basel III capital surcharges for G-SIBs are far less effective in managing systemic risk in comparison to network-based, systemic risk-dependent financial transaction taxes. Journal of Economic Dynamics and Control 77 230-246. 10.1016/j.jedc.2017.02.004 <https://doi.org/10.1016/j.jedc.2017.02.004>. 10.1016/j.jedc.2017.02.004 10.1016/j.jedc.2017.02.004 10.1016/j.jedc.2017.02.004 info:eu-repo/semantics/objectFile info:eu-repo/semantics/humanStartPage