Sunday, March 19, 2006

RE: st: RE: cumulative sum with depreciation

Thanks, it is easier than what I imagined... André

>From: "Nick Cox" <n.j.cox@durham.ac.uk> >Reply-To: statalist@hsphsun2.harvard.edu >To: <statalist@hsphsun2.harvard.edu> >Subject: st: RE: cumulative sum with depreciation >Date: Sun, 19 Mar 2006 19:10:20 -0000 > >bysort Firm (year) : gen S_t = 0 >by firm : replace S_t = 0.85 * S_t[_n-1] + R_t if _n > 1 > >Nick >n.j.cox@durham.ac.uk > >André Paul > > > I would like to build a stock variable with declining balance > > depreciation: > > > > S_t=0.85*S_t-1 + R_t > > (the initial value is always 0) > > > > The data (an unbalanced panel) looks like: > > > > Firm year R > > 2 1980 0 > > 2 1981 1 > > 2 1982 0 > > 2 1983 7 > > 2 1984 9 > > 2 1985 4 > > 2 1986 3 > > 3 1994 0 > > 3 1995 0 > > 3 1996 0 > > 3 1997 1 > > 3 1998 0 > > . > > . > > . > > > > But I couldn't find a way to build the variable "S", can > > anybody help me? > >* >* For searches and help try: >* http://www.stata.com/support/faqs/res/findit.html >* http://www.stata.com/support/statalist/faq >* http://www.ats.ucla.edu/stat/stata/

_________________________________________________________________ MSN Hotmail : créez votre adresse e-mail gratuite & à vie ! http://www.imagine-msn.com/hotmail/default.aspx?locale=fr-fr

* * For searches and help try: * http://www.stata.com/support/faqs/res/findit.html * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/


Tag:


Links to this post:

Create a Link



<< Home

This page is powered by Blogger. Isn't yours?