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    Beta of 0 and p-value of 1

    Hello, I am estimating a 2 stages least squares model. My first stage is fine ( strong instrument) but my second stage gives my coëfficiënt in which I am interested a beta of 0 and a p-value of 1. No matter what dependent variable I use the beta is Always 0 with a p-value of 1. Does...
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    Marginal effect Tobit in Stata

    Hi everyone, How can I calculate with the margins command the marginal effect of a variable for a Tobit model in Stata using for all variables their mean value ? So, in other words, how can I calculate the marginal effect at the mean of all variables? Any help is much appreciated...
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    simultaneous equations stata

    Hi, I want to estimate the following simultaneous equations: y1= y2+x1+x2+x3 y2=y1+x1+x2+x3 When the control variables are not the same then it is possible to use reg3, but I do not have this. How can I estimate the above system in stata? Thanks!
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    Reshaping dataset

    Hi, I have a dataset that has the following variables: date stock1 stock2 stock3 etc. where the stockprices are recorded for each stock at each date for 300 dates. But what I want is to reshape the data in stata such that I get date and then a variable prices where each stock...
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    IV probit and Ivreg

    Hello, When I use ivreg in Stata and cluster standard errors my results show that the independent variable is significant. However, when I use ivprobit (which makes more sense, as my dependent variable is a response variable that can only take on either the value 1 or 0) the independent...
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    IV results interpretation

    Hello, I have an endougenous variable x and an instrument for it, variable z. The instrument is (significantly) negatively related to x. My hypothesis expects a positive effect of my endogenous variable x on y, my dependent variable. When using 2SLS ivreg in Stata does this mean that (because...
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    IV regression Stata interpretation

    Dear all, I have an endougenous variable x and an instrument for it, variable z. The instrument is (significantly) negatively related to x. I expect a positive effect of my endogenous variable x on y, my dependent variable. When using 2SLS ivreg in Stata does this mean that (because of the...
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    data manipulation stata

    data dropping stata 2 Hi all, I have the following panel of firms: A balanced panel of firms: FirmID Year Respondvariable 1 0 30 1 1 40 1 2 30 1 3 30 1 4 30 2 0 40 2 1 463 2 2 . 2 3 . 2 4 . 3 0 30 3 1 463 3 2 . 3 3 . 3 4 40 In year 0 all firms...
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    dropping firms in paneldataset

    Hi all, I have the following panel of firms: A balanced panel of firms: FirmID Year Respondvariable 1 0 30 1 1 40 1 2 30 1 3 30 1 4 30 2 0 40 2 1 263 2 2 . 2 3 . 2 4 . In year 0 all firms either have 40 or 30 on the respond variable. Now I want to...