Variable Creation & Transformation

Question 1

Create new variable

Answer 1

gen newvar = expression

Question 2

Modify existing values

Answer 2

replace var = expression

Question 3

Remove a variable

Answer 3

drop varname

Question 4

Add label to variable

Answer 4

label variable varname “label”

Question 5

Natural log transformation

Answer 5

gen ln_var = ln(var)

Question 6

Percent growth from log-difference

Answer 6

gen gr_ln_var = (ln_var - L.ln_var)*100

Question 7

Difference between variables

Answer 7

gen diff = var1 - var2

Question 8

Log-difference growth

Answer 8

gen growth = (ln_var - L.ln_var)*100