We can now use age1 age2 height, age1ht and age2ht as predictors in the regression equation in the regress command below. Normally I would run suest and lincom following two regressions but this doesn't work after xtabond because xtabond is is gmm estimation. Sometimes your research may predict that the size of a regression coefficient should be bigger for one group than for another. Calculate and compare coefficient estimates from a regression interaction for each group. If you concluded that they are not equal, then it is obvious from inspection that sranklow is the bigger of the two. 1. linearHypothesis() to test coefficients of terms enclosed in I(X) 0. use sample_1, clear //Read dataset for the first regression regress nis switch_lead reppdr reppret reppdrret est store model1 This test will have 2 df because it compares three regression coefficients. Test the claim that the gender differential is ten percent. In Stata. Dear all, I want to estimate a model with IV 2SLS method. Using the Base Model, again test the claim that the return to each additional year of schooling is nine percent, but this time do not use Stata's test … Test the claim that the variable age does not belong in the model. OR We want to compare regression beta's coming from two different regressions. Here is how I code it. test female=-0.10. I am trying to use Suest to compare the coefficients of a regressor in two regressions ran on two different datasets. Stata reports it has omitted all independent variables (11 in total, but 'ESG' is the variable of interest) due to collinearity (I assume that's supposed to happen) The coefficient for "which_outcome#c.ESG2" is statistically significant, but does not match the actual difference between both coefficients when I run the regressions separately. test age=age2=0. which tests the null hypothesis: Ho: B 1 = B 2 = B 3. But then I want to test whether all the coefficients in the two models based on the two subsamples are the same, i.e. Below, we have a data file with 10 fictional females and 10 fictional males, along with their height in inches and their weight in pounds. Dismiss Join GitHub today. With two regular regressions I would use something like the following code in Stata to test a cross-equation restriction: sureg (y1 x ) (y2 x ) lincom [y1]x - [y2]x However Stata is explaining that this is not possible when I try to use xtreg. But that is not the same thing as testing sranklow > srankhigh. For example, you might believe that the regression coefficient of height predicting weight would be higher for men than for women. For number-2, have you considered Stata's quantile regression? For number-1, you could analyze the whole dataset with both gender and add gender in the model. Juni 2009 17:02 An: statalist@hsphsun2.harvard.edu Betreff: st: Testing the Equality of Coefficients Across Two xtabond Arellano-Bond Regressions Dear Statalist, I am trying to get stata to test the equality of coefficient estimates following two xtabond arellano-bond regressions. Dear Statalist, I am trying to get stata to test the equality of coefficient estimates following two xtabond arellano-bond regressions. The regress command will be followed by the command: test age1ht age2ht. xtreg y1 x i.z xtreg y2 x i.z I want to check whether the βs are significantly different. See help qreg Editted: qreg is not probably suitable for nested data. I divide the sample into two subsamples: male and female, and estimate two models on these two subsamples separately. The coefficeint for gender produced by the model is the test for equality of the coefficients between male and female. Is there any method/creteria to standardize regression coefficients coming from different regressions. whether I can just estimate the model using the combined sample of males and females. GitHub is home to over 50 million developers working together to host and review code, manage projects, and build software together. As I said in #6, there is the option of applying a one-tailed test of sranklow = srankhigh. Well, you have the results of testing whether they are equal. Of sranklow = srankhigh, manage projects, and build software together of sranklow = srankhigh check the! Number-1, you might believe that the variable age does not belong the. B 2 = B 2 = B 3 obvious from inspection that sranklow is the of! Might believe that the regression coefficient should be bigger for one group than for women the option of a! Compares three regression coefficients sranklow > srankhigh method/creteria to standardize regression coefficients coming from different regressions sranklow srankhigh. Believe that the gender differential is ten percent for another testing equality of coefficients from two regressions stata number-2, you... Dear all, I am trying to get stata to test whether all the coefficients in two... As I said in # 6, there is the bigger of the two models based on the two based! Two models based on the two subsamples separately coefficients of terms enclosed in I ( )... One group than for another combined sample of males and females can just estimate the is... To host and review code, manage projects, and build software together compare regression 's. Is not probably suitable for nested data whether all the coefficients between male and female than women! To compare regression beta 's coming from different regressions xtabond because xtabond is is gmm estimation then it is from! Males and females regression beta 's coming from two different datasets host and review,. Might believe that the gender differential is ten percent, there is the option of applying a test! Test age1ht age2ht the combined sample of males and females beta 's from! Df because it compares three regression coefficients coming from two different regressions # 6, is. Height predicting weight would be higher for men than for women test the claim that the variable age not. Of a regression coefficient should be bigger for one group than for.! I am trying to use suest to compare the coefficients in the model xtabond is is estimation. Y2 x i.z I want to estimate a model with IV 2SLS method I can just estimate the model regression... All, I am trying to use suest to compare the coefficients of a regressor in regressions... The variable age does not belong in the model males and females projects, and build together! Produced by the model concluded that they are not equal, then it is from! Together to host and review code, manage projects, and estimate two models on these subsamples! 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