TFP volatility

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TFP volatility

Postby zhanghuifd » Tue May 16, 2017 2:35 am

Dear friends,
I have encountered a simple problem. And it may be not related to dynare.
I saw Prof. Pfeifer's paper(2014) used Fernald's newest data as TFP.
Is it also measured as TFP volatility?
Also, I am confused how to transform Fernald's series (dTFP) into TFP.
Is it just the inverse of log difference?
Sorry! Thanks in advance!
Last edited by zhanghuifd on Tue May 16, 2017 11:56 pm, edited 1 time in total.
zhanghuifd
 
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Re: TFP volatility

Postby jpfeifer » Tue May 16, 2017 6:07 am

We used the following Matlab code to get the levels:
Code: Select all
[d_TFP]=xlsread('fernald_tfp.xlsx','quarterly','N4:N276');
tfp_obs = cumsum((d_TFP-nanmean(d_TFP))/400); % as Fernald series is annualized in percent

where the first period is now 1947Q2.
------------
Johannes Pfeifer
University of Cologne
https://sites.google.com/site/pfeiferecon/
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Re: TFP volatility

Postby zhanghuifd » Tue May 16, 2017 7:09 am

Hi, professor!
Thanks for your help!!
(Some other literature also uses the method of garch to compute it.)
zhanghuifd
 
Posts: 36
Joined: Tue Mar 21, 2017 8:14 am

Re: TFP volatility

Postby jpfeifer » Tue May 16, 2017 11:19 am

GARCH is a different concept without volatility shocks and thus not really a structural approach suitable for models.
------------
Johannes Pfeifer
University of Cologne
https://sites.google.com/site/pfeiferecon/
jpfeifer
 
Posts: 6940
Joined: Sun Feb 21, 2010 4:02 pm
Location: Cologne, Germany

Re: TFP volatility

Postby zhanghuifd » Tue May 16, 2017 11:58 pm

Hi, professor!
Okay. So much thanks for your advice!
zhanghuifd
 
Posts: 36
Joined: Tue Mar 21, 2017 8:14 am


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