* do-file for Supplementary Exercise 3.14 of IPS7e
version 18 /* works also with versions 13-17 */

import delimited "R:\Chapter 3\ex03_014.csv", varnames(1) 
set seed 140906
sample 20, count
list name, sep(20)

* alternative, and more general, method, using a column of random numbers
import delimited "R:\Chapter 3\ex03_014.csv", clear varnames(1)
set seed 140906
gen random=uniform()
sort random
list name random, sep(20)
* apparently, this gives the same result as above (which it wouldn't necessarily have to do!)