STATA COMMANDS WE USED IN THE CLASS

STATA COMMANDS WE USED IN THE CLASS - 9) list in 1/20 Lists...

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STATA COMMANDS WE USED IN THE CLASS: 1) reg testscr str expn_stu el_pct ,robust Runs a linear regression of testcr on str, expn_stu and el_pct and uses heteroskedasticity adjusted standard errors 2) test str expn_stu el_pct You should use it after running the regression. Tests the joint hypothesis that coefficients on str expn_stu and el_pct are all equal to zero. 3) test (str=0) ( expn_stu=0) ( el_pct=0) Another way of writing the hypothesis in (3) 4) test (str= expn_stu= el_pct) Tests the joint hypothesis that coefficients on str expn_stu and el_pct are all equal to each other. 5) test (str=expn_stu) ( el_pct=0) Tests the joint hypothesis that coefficients on str and expn_stu are equal to each other and at the same time coefficient on el_pct is equal to 0. 6) sum If you just write sum and click enter, STATA gives you the summary of the all variables 7) sum testscr str expn_stu el_pct Gives you the summary of the variables testcr, str, expn_stu and el_pct 8) list Lists all data available for all variables starting from observation1.
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Unformatted text preview: 9) list in 1/20 Lists data for all variables between observation1 and observation 20. 10) list testscr str expn_stu el_pct in 1/20 Lists data for str, expn_stu and el_pct between observation1 and observation 20. 11) generate D=0 Generates a new variable D which takes value 0 for all observations 12) generate str2=str^2 Generates a new variable named str2 which is square of str. 13) replace D=0 Replaces the value of D by 0 for all observations. 14) replace D=1 if str<=20 Replaces the values of D by 1 if the corresponding value of the variable str is less than or equal to 20. (This command together with generate is particularly useful to construct Dummy variables in STATA) 15) tab D Tabulates the values of the variable D ( It is meaningful if we have a discrete random variable, for instance if we run t ab D , we will get the percentage of 0 and 1 in D)....
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This note was uploaded on 07/02/2009 for the course ECON 1150 taught by Professor Staff during the Summer '08 term at Pittsburgh.

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