MacroX CPI Update
Key takeaways
Supercore
One of the many things that give us confidence in our view is that both the levels and momentum of our wage pressures measure significantly explain the path of Supercore and Core Services ex-Housing CPI as the below chart shows:
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Prevent overfitting - The dogs that should not bark!
An interesting way to test for overfitting is that constructed measures should only relate to appropriate and intuitive concepts. Equally important is that our measures should remain intuitive and NOT predict certain things. For example, our wage measure should not predict goods as well as services and our supply-chain pressure measure should not impact services. Reassuringly, we find that is the case with our wage measures excelling at CPI services and with 0 power over goods, while supply pressures explain the variation in PPI goods but not services.?
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