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211. Showing scale breaks on graphs
     How can I show scale breaks on graphs?

212. Missing values reported by stsum
     Why does stsum sometimes report missing values for the percentiles of survival time?

213. Passing arguments to do-files
     How can I pass arguments to my do-files?

214. Fisher’s exact test two-sided idiosyncrasy
     Why does Fisher’s exact test disagree with the confidence interval for the odds ratio?

215. Calculating the number of distinct values
     How do I calculate the number of distinct values seen so far?

216. Analysis of multiple failure-time survival data
     How do I analyze multiple failure-time data using Stata?

217. Obtaining marginal effects without standard errors
     When I run mfx, I am getting the warning message “warning: predict() expression unsuitable for
     standard-error calculation; option nose imposed.” What does that mean?

218. The accuracy of the float data type
     How many significant digits are there in a float?

219. How to calculate power using simulation
     How can I use Monte Carlo simulations to estimate power in Stata?

220. Mills’ ratios and censoring direction in the Heckman selection model
     Why are there so many formulas for the inverse of Mills’ ratio?



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