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2009 Nov 03
1
creating mulptiple new variables from one data.frame according to columns and rows in that frame
Dear R-helpers,
I have a data.frame (bcpe.lat.m) containing 13 countries, ages 0-50yrs per month, and the corresponding mu&sigma (see below).
* I would like to limit the age range to include all 12 months for the 1st 5 years and only whole years for all ages thereafter for each of the countries present in the data frame.
* I would like to create separate data.frames according
2009 Jul 12
0
ERROR message while using <-invMillsRatio()
Hi
I have been trying so many different things to get my Inverse Mills Ratio
going for a Two stage Heckman Model, I have tried the following so far (the
commands are listed below till teh point where I get an error), I get an
error in the last sentence (marked in bold below), if this were successful
then I could have used the IMR as a control in my OLS (which would be the
OLS for the outcome