... thatthese perceptions represent the best available estimates of the unobservable variables from the perspective of the central bank. Similarly, we use the superscripteas a short-hand for the rational ... to the most recent observation prior to the policy decision from period t − 1, rather than from period k, that was the most recent period with a significantcross-check.We compare the rule with ... applies, i.e. the optimal policy must satisfy the first-order condition, equation (4), in expectation (see, for example, Svensson and Woodford(2003) for the NK-Model and Wieland (2006) for the K-Model).11Then,...