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2013 Oct 17
0
Singular Matrix 'a' in solve
...ables (set as I, pop, inv, gov, c, life, d;
which each is “numeric[450]”). The procedure is modify from code provided
by B.E. Hansen at http://www.ssc.wisc.edu/~bhansen/progs/ecnmt_00.html.
*Then the variable is being transformed to*
y <- lag_v(i,0)
cf <- lag_v(c,0)
lpop <- lag_v(pop,0)
linv <- lag_v(inv,0)
lgov <- lag_v(gov,0)
d1 <- lag_v(d,0)
llife <- lag_v(life,0)
yt <- tr(y)
ct <- tr(cf)
y, cf, lpop, linv, lgov, d1, llife each is in “375x1 double matrix”
yt and ct each is “300x1...
2010 Nov 24
0
negative binomial regression, unbalanced panel
...sed count. So far I have used fixed-effects negative binomial
regression, i.e. assuming constant within-group dispersion. The command
in Stata is xtnbreg, fe.
How could I replicate this in R?
I have found the package pglm, and tried the following
pglm(T_total ~ Lgdpqt_2 + Lgdpqt_3 + Lgdpqt_4 + lpop + yrsconflict +
past_T_total + Lpolcat_2 + Lpolcat_3 + Lpolcat_4 + Lgdpgr +
mob_fixed +
wdi_urbanpop + Lopen + Ldurable + factor(year), data = df, family =
negbin, model = "within", index = c("code","year")))
This takes ages, and then retu...