[Date Prev][Date Next][Thread Prev][Thread Next][Date index][Thread index]
st: Creating quintiles with "xtile"
I have a dataset of stock returns each month. For each month, I'd like to
sort the stocks into quintiles. What I'd really like to do is something
by date: xtile newvar = ret, nq(5)
However, Stata doesn't let me combine "xtile" with "by". I can obviously get
around this by looping through the dates, but this is time-consuming. In
many other applications, I can use "by" to save on a loop (e.g. sort date,
by date: egen newvar = mean(ret)) but I can't seem to use it here. Does
anyone know of a more efficient way to generate my quintiles per month?
Live Search Maps – find all the local information you need, right when you
need it. http://maps.live.com/?icid=hmtag2&FORM=MGAC01
* For searches and help try: