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Further ERM Session 3: Stress testing incorporating causal dependency
This presentation is based on a part of an academic course on Further Enterprise Risk Management (Further ERM) titled ‘Stress testing incorporating causal dependency’ and covers topics such as: stress testing (association versus causation), frequentist versus subjective statistical approaches, marginal, conditional and joint probabilities, Bayesian nets, governance and handling really extreme events
Slides
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Session 3: Stress testing incorporating causal dependency
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Stress testing
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Session 3: Stress testing incorporating causal dependency
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Association or causation?
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Limits of quantitative risk analysis
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Frequentist versus subjective probabilities
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Frequentist versus subjective probabilities (ctd)
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Behavioural biases
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Cognitively more reliable approaches (1)
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Cognitively more reliable approaches (2)
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Such a model may also be more intrinsically helpful
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Session 3: Stress testing incorporating causal dependency
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Implementing causal dependencies in practice
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Low order conditional probabilities
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Bayes theorem
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Linking marginal and conditional probabilities (1)
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Linking marginal and conditional probabilities (2)
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Joint probabilities from marginal and conditional ones
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Conditional independence
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Session 3: Stress testing incorporating causal dependency
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Bayesian networks (or nets)
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Bayesian nets: direction of causality
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Bayesian nets: conditional probability table for node
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Using Bayesian nets
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Additional challenges: mathematical
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Additional challenges: judgemental
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Selecting and combining stress tests
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Top down versus bottom up
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Credibility with audience
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Other sanity checks
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Reverse stress testing
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Incorporating stress tests in portfolio construction
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Session 3: Stress testing incorporating causal dependency
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Governance
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Session 3: Stress testing incorporating causal dependency
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Really extreme events
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Really extreme events: suggestions in Kemp (2010)
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