Abstract
We consider the classic question posed by Pardo and Spergel about theprice of abandoning dark matter in the context of an invariant,metric-based theory of gravity. Our answer is that the price isnonlocality. This has been known for some time in the context of thequasi-static regime. We show that it also applies for cosmology andwe exhibit a model which reproduces standard CDM successes such asperturbations in the cosmic microwave background, baryon acousticoscillations and structure formation.
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