“…In empirical studies employing univariate methods (see, e.g., Cecchetti and Debelle (2006)), in ‡ation has invariably been found highly persistent, and this persistence has typically been interpreted as dependence on past in ‡ation in forming expectations and, hence, as evidence against the NKPC. Also, Whelan (2005a, 2007), and Nason and Smith (2008a), inter alia, have found little evidence of forward-looking in ‡ation dynamics in analyses based on estimated NKPCs for the U.S. On the other hand, the recent results of Lanne and Saikkonen (2011a) and Lanne et al (2011) based on so-called noncausal autoregressive (AR) models suggest that the persistence in the U.S. in ‡ation results from agents'forward-looking behavior rather than dependence on past in ‡ation.…”