You are repeating yourself. At least post as a reply to your earlier post.
Does
RSiteSearch("technological logistic")
help?
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Sent from my phone. Please excuse my brevity.
On July 30, 2014 8:54:25 AM PDT, Peter Maclean <pmaclean2...@yahoo.com> wrote:
> Any one with an idea of estimating the Technological/Logistic
>substitution model.
>The model is specified as:
>fi(t(j)) = 1/[1-exp(-alpa(t(i))-beta(i)] for t 0
>fi(t(j)) = 1-sum(f(j-1))- sum(f(j+1)) for tb <=t <= tc
>fi(t(j)) = 1/[1+ exp(alpas(t(i)-betas(i))] for t >=tc and alphas >0. T
>The model assume that n technologies are introduced to the market,
>where 1 is the oldest and technology n is the newest, i and j are
>subscripts representing the type of technology, fi is the market share,
>t is a subscript denoting time, alpha, alphas, beta, and betas are
>parameters, tb and tc are time periods during which the technology i
>starts to enter the saturation and decline phase, respectively. Any
>suggestion, reading will be appreciate.
>
>Peter Maclean
>Department of Economics
>UDSM
>
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>https://stat.ethz.ch/mailman/listinfo/r-help
>PLEASE do read the posting guide
>http://www.R-project.org/posting-guide.html
>and provide commented, minimal, self-contained, reproducible code.
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