The timeline of ZLB episodes with forward guidance is presented in table 1B. (A) The phase diagram of the WUNK model during forward guidance is similar to the diagram in figure 1D, but with . The equilibrium trajectory during forward guidance is the unique trajectory reaching the natural steady state at time . (B, C) The phase diagram of the WUNK model at the ZLB comes from figure 1D. The equilibrium trajectory at the ZLB is the unique trajectory reaching the point determined by forward guidance at time . The figure shows that the NK model's anomaly disappears in the WUNK model: a long-enough ZLB episode prompts a slump irrespective of the duration of forward guidance.
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