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161. Resampling and missing values
     Why does bootstrap give a warning message for non-eclass commands?

162. Interpreting “...completely determined” when running logistic
     What does “completely determined” mean in my logistic regression output?

163. Creating dummy variables
     How do I create dummy variables?

164. Creating percent summary variables
     How can I create variables containing percent summaries?

165. Stata 7: Mac memory allocation
     Stata 7: Mac memory allocation

166. Calculating proportional change of categorical covariates
     How can I estimate proportional changes using margins for categorical variables?

167. Within group collinearity in conditional logistic regression
     Why does clogit sometimes report a coefficient but missing value for the standard error, confidence
     interval, etc.?

168. Explanation of the delta method
     What is the delta method and how is it used to estimate the standard error of a transformed
     parameter?

169. Selecting a subset of observations with a complicated criterion
     How do I select a subset of observations using a complicated criterion?

170. Number of observations for subpopulation estimation
     How is the number of observations computed for subpopulation estimation?



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