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241. Calculate percentiles with survey data
     How do I obtain percentiles for survey data?

242. Use of ml for nonlinear model
     How do I estimate a nonlinear model using ml?

243. Exporting tables from Stata
     How do I export tables from Stata?

244. Comparison of standard errors for robust, cluster, and standard estimators
     How can the standard errors with the vce(cluster clustvar) option be smaller than those without the
     vce(cluster clustvar) option?

245. Fitting ordered logistic and probit models with constraints
     How can I convert Stata’s parameterization of ordered probit and logistic models to one in
     which a constant is estimated?

246. Tests comparing levels of a categorical variable after anova or regress
     How can I form various tests comparing the different levels of a categorical variable after anova or
     regress?

247. Use the round() function to transform the numeric time variable so that the new variable contains only integer values
     If a time variable has noninteger values after we import data from an Excel file, how do we declare
     the panel data with the xtset command?

248. Accounting for clustering with mi impute
     How can I account for clustering when creating imputations with mi impute?

249. Obtaining elasticities for independent variables
     When I use the eyex option of margins, what is it actually computing and how does it relate to the
     coefficients of the loglinear model?

250. Pie and bar charts
     How can I create a pie or bar chart containing categorical data?



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