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Revisiting the Great Moderation using the Method of Indirect Inference

Revisiting the Great Moderation using the Method of Indirect Inference

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Table 1: Competing Rival Models<br />

Baseline framework<br />

IS curve x t = E t x t+1 ( 1 )(~{ t<br />

E t t+1 ) + v t<br />

Phillips curve<br />

t = E t t+1 +x t +u w t<br />

Monetary policy versions<br />

Optimal Timeless Rule<br />

(model one)<br />

original Taylor Rule<br />

(model two)<br />

& transformed equation<br />

t = (x t<br />

x t 1 ) + t<br />

i A t = A t +0:5x t +0:5( A t<br />

0:02) + 0:02 + t<br />

~{ t = 1:5 t +0:125x t + 0 t<br />

`IRS' Taylor Rule (2)<br />

i<br />

(model three)<br />

A t = (1 )[ + <br />

( ) + x<br />

x t ] + i A t 1 + t<br />

& transformed equation ~{ t = (1 )[ <br />

t + 0 xx t ] + ~{ t 1<br />

+ 0 t<br />

Since <strong>the</strong>se models dier only in <strong>the</strong> monetary policies being implemented, by comparing<br />

<strong>the</strong>ir capacity to t <strong>the</strong> data one should be able to tell which rule, when included<br />

in a simple New Keynesian model, provides <strong>the</strong> best explanation <strong>of</strong> <strong>the</strong> facts and <strong>the</strong>refore<br />

<strong>the</strong> most appropriate description <strong>of</strong> <strong>the</strong> underlying policy. We go on to investigate<br />

this in what follows.<br />

5 The <strong>Method</strong> <strong>of</strong> <strong>Indirect</strong> <strong>Inference</strong><br />

We evaluate <strong>the</strong> models' capacity in tting <strong>the</strong> data <strong>using</strong> <strong>the</strong> method <strong>of</strong> <strong>Indirect</strong> <strong>Inference</strong><br />

originally proposed in Minford, Theodoridis and Meenagh (2009) and subsequently with<br />

a number <strong>of</strong> renements by Le et al. (2011) who evaluate <strong>the</strong> method <strong>using</strong> Monte Carlo<br />

experiments. The approach employs an auxiliary model that is completely independent<br />

<strong>of</strong> <strong>the</strong> <strong>the</strong>oretical one to produce a description <strong>of</strong> <strong>the</strong> data against which <strong>the</strong> performance<br />

<strong>of</strong> <strong>the</strong> <strong>the</strong>ory is evaluated indirectly. Such a description can be summarised ei<strong>the</strong>r by <strong>the</strong><br />

13

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