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==Measuring the Multiplier==
==Measuring the Multiplier==
Some researchers have used a [[regression analysis]] technique known as SVAR<ref>[http://faculty.washington.edu/ezivot/econ584/notes/svar%20survey.pdf Jan Gottschalk: ''An Introduction into the SVAR Methodology: Identification, Interpretation
One group of  researchers use a [[regression analysis]] technique known as SVAR<ref> Jan Gottschalk: ''An Introduction into the SVAR Methodology: Identification, Interpretation
and Limitations of SVAR models, KielWorking Paper No. 1072, August 2001]</ref> to determine the typical reaction of output to previously recorded fiscal changes. The problem about this method is that fiscal changes have often been taken in response to other things happening in the economy. Separating the impact of those other factors from the impact of fiscal change very difficult, and  failure to do so can result in [[omitted-variable bias]] resulting in an underestimate of the multiplier. According to [[Christine Romer]], that has been a common cause of error<ref>[http://elsa.berkeley.edu/~cromer/Written%20Version%20of%20Effects%20of%20Fiscal%20Policy.pdf Christina D. Romer: ''What do we know about the effects of fiscal policy?'', Lecture at Hamilton College, November 7, 2011]</ref>
and Limitations of SVAR models, KielWorking Paper No. 1072, August 2001 [http://faculty.washington.edu/ezivot/econ584/notes/svar%20survey.pdf]</ref> to determine the typical reaction of output to previously recorded fiscal changes. The problem about this method is that fiscal changes have often been taken in response to other things happening in the economy. Separating the impact of those other factors from the impact of fiscal change can be very difficult, and  failure to do so successfully can result in [[omitted-variable bias]] resulting in an underestimate of the multiplier. According to [[Christine Romer]], that has been a common cause of error<ref>[http://elsa.berkeley.edu/~cromer/Written%20Version%20of%20Effects%20of%20Fiscal%20Policy.pdf Christina D. Romer: ''What do we know about the effects of fiscal policy?'', Lecture at Hamilton College, November 7, 2011]</ref>. Another approach involves the use of a previously calibrated [[general equilibrium]] (DSGE<ref>[http://www.econ.kuleuven.be/ew/academic/intecon/Degrauwe/PDG-papers/Recently_published_articles/PCH2010.pdf  Paul De Grauwe ''The scientific foundation of dynamic stochastic general equilibrium (DSGE) models'', Public Choice, 13 July 2010]</ref>) model of the economy
 
<ref>[http://www.econ.kuleuven.be/ew/academic/intecon/Degrauwe/PDG-papers/Recently_published_articles/PCH2010.pdf  Paul De Grauwe ''The scientific foundation of dynamic stochastic general equilibrium (DSGE) models'', Public Choice, 13 July 2010]</ref>
 
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Christine Romer has argued that that it is "incredibly hard" to estimate the value of a multiplier because fiscal actions are often taken in response to other things happening in the economy, and separating the impact of those other factors from the impact of fiscal change very difficult. Failure to do so can result in [[omitted-variable bias]] resulting in an underestimate of the multiplier - an error that Ms Romer believes to be common.
 
 




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Revision as of 08:47, 17 November 2012

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Tutorials relating to the topic of Fiscal multiplier.

Measuring the Multiplier

One group of researchers use a regression analysis technique known as SVAR[1] to determine the typical reaction of output to previously recorded fiscal changes. The problem about this method is that fiscal changes have often been taken in response to other things happening in the economy. Separating the impact of those other factors from the impact of fiscal change can be very difficult, and failure to do so successfully can result in omitted-variable bias resulting in an underestimate of the multiplier. According to Christine Romer, that has been a common cause of error[2]. Another approach involves the use of a previously calibrated general equilibrium (DSGE[3]) model of the economy