OBSERVATIONAL CONSTRAINTS ON MODELS OF INFLATION
UPDATED VERSION OF A TALK AT COSMO2K, TO APPEAR IN THE PROCEEDINGS.
Present data require a spectral index n ≳ 0.95 at something like 1-σ level. If this lower bound survives it will constrain 'new' and 'modular' inflation models, while raising it to 1.00 would rule out all of these models plus many others.