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Dear R users, I have a simple question (probably) but i couldnt how to find a solution for that. i am using 2 digit industry codes and 3 digit industry codes for my model, and i need to create dummies for the industries. The case is simple for the 2-digit industries since there are not that mcuh of them, so i am creating my dummies as following ind_2da<-(ind_2d==11)#for the 11th industry

Dear R users, I think i have a simple question which i want to explain by an example; i have several 2-digit industry codes that i want to use for conducting by-industry analysis but i think there is a problem with the degrees of freedom! for example, when i do my analysis without any 2-digit industry code, i got the following summary (i have 146574 observations in total): >

...d dummies "automatically" (e.g., if you use regression, etc.). Actually - it'd be nice to know what you are building your dummies for. Dimitri On Fri, Apr 23, 2010 at 11:34 AM, David Winsemius <dwinsemius@comcast.net> wrote: > > On Apr 23, 2010, at 11:26 AM, serdal ozusaglam wrote: > >> >> Dear R users, >> >> I have a simple question (probably) but i couldnt how to find a solution >> for that. >> >> i am using 2 digit industry codes and 3 digit industry codes for my model, >> and i need to create dummies for the indust...

Hello everyone, I have a peoblem to create the twoways effect in the plm package. when i try to create the following dsn1<-plm(lnQ~lnC+lnL+lnM+lnE+eco+RD,data=newdata,effect="twoways",model="within") i have this error: Error in rep.int(c(1, numeric(n)), n - 1L) : negative length vectors are not allowed and to be honest i have no idea what does it mean!! can someone

Dear all, I have a basic(!) econometric question which i couldnt find the way to do it in R. Well this could be also because of my wrong interpretation of the econometric process that i am trying to implemet.so here i wanna ask if am doing a logical mistake!!! so here is the question with the explanation of the process, hope there will be someone who can help me! suppose i have a basic

hi, i am writing my master thesis and i am dealing with 146474 observations (panel data), i have just learned the R so i am a beginner!! i am trying to use the "plm" package and i have a duplication problem; i have written the following commands to read my data and create my model >dsn<-plm.data(ds, c("stno", "year")) ds=name of my data, stno=individual

Thank you for your advice, ill try to be more explicit now, i wasnt in the first mail because i thought it is a simple question to answer, so; i have a panel data which contains 48858 observations during 3 year therefore, there are 146574 observations in total, i have 22 different industries defined by 2-digit codes such as 11, 13,14,16...40 therefore, ind_2d contains 22 2-digit codes for