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From |
"Austin Nichols" <austinnichols@gmail.com> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: How to generate a cumulative sum |

Date |
Thu, 25 Oct 2007 14:05:55 -0400 |

That should be "lag operators" not "log operators" of course. Though a log could be handy for related problems... On 10/25/07, Austin Nichols <austinnichols@gmail.com> wrote: > Damiano Rossi <west--@libero.it>: > Not sure which previous post you refer to, and "doesn't help" doesn't > help clarify the confusion, but you can certainly get what you need > from -by- and log operators (see -help tsvarlist-) e.g. > > webuse grunfeld, clear > g k0=int(uniform()*1000) if year==1935 > g k=. > bys c (y): replace k=cond(l.k<.,l.k*(1-`d'),k0)+i > li com year k0 k inv in 1/10, noo sepby(com) > > On 10/25/07, west--@libero.it <west--@libero.it> wrote: > > Dear all, > > > > I need some help to compute a capital stock series from a gross investment series. My primary problem is that I have to estimate the initial capital stock (K_0 ) for each firm. As a general rule, it is used the book value of fixed capital (K) in the first year of data (e.g. 1996) for each firm. How can I command Stata to consider this first observation (firm by firm) and then compute a capital stock series, using a perpetual inventory and a constant rate of depreciation? A previous post doesn't help me much on this point. These are the data. > > > > Panl oif 300 firms, 10 years (1996-2006) > > k = capital stock > > I = capital investment > > d [delta] = 0.05 > > > > The evolution of the real capital stock is: > > K_t+i = (1 - d)*K_t+i-1 + I_t+i > * * 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/

**References**:**st: How to generate a cumulative sum***From:*west--@libero.it

**Re: st: How to generate a cumulative sum***From:*"Austin Nichols" <austinnichols@gmail.com>

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