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30/06/2017
Q: Why some coefficients are usually dropped in Stata output? Ans: Because of collinearity among regressors.
25/12/2016

Q: Why some coefficients are usually dropped in Stata output? Ans: Because of collinearity among regressors.

03/12/2016
29/08/2016

Let us load an example data in Stata. Remove the codeline: before running the codes in codelines.
codeline: sysuse auto, clear
Now describe the structure of the data. It will show
codeline: describe
The following code takes observation of variable: rep78 one by one, calculate the median for each selection of the group of observations of price variable and computes its median
codeline: by rep78, sort: egen medprice = median(price)
The following codeline to generate the difference of the price values and the media of price calculated in groups by rep78.
codeline: generate deltaprice = price - medprice
This tabulates the produced data to see the >medprice and

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