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| From | Lulu Zeng <luluzengnz@gmail.com> |
| To | "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu> |
| Subject | Re: st: Drawing from a known, non-regular, discrete distribution |
| Date | Tue, 18 Feb 2014 20:17:53 +1100 |
Dear Nick, My apologies for the unclear description. 1. I have 2 variables in Stata, one variable holds the 1200 known, discrete values I want to draw; the other holds the corresponding probabilities. 2. The 2 variables are associated with a parameter (attribute) of a random utility model. I am trying to draw from the distribution of this parameter of interest, and then divide it by the price parameter (which similarly has 2 associated variables too) to obtain a distribution of willingness to pay. Best Regards, Lulu On Tue, Feb 18, 2014 at 7:47 PM, Nick Cox <njcoxstata@gmail.com> wrote: > You have not, so far as I can see, specified > > 1. How you are holding information on your distribution. Is it 1200 > known values with associated probabilities (so as two variables in > Stata), or is the information still outside Stata in some form? > > 2. What you expect to draw as a sample. > Nick > njcoxstata@gmail.com > > > On 18 February 2014 03:58, Lulu Zeng <luluzengnz@gmail.com> wrote: >> Dear Scott, >> >> Thank you for your response. My apologies that I am still a little >> confused about how to do this in my case where I have 1,200 >> observation. Can I still use the cond() command without typing in each >> point of the draw? >> >> Best Regards, >> Lulu >> >> On Tue, Feb 18, 2014 at 1:50 PM, Scott Merryman >> <scott.merryman@gmail.com> wrote: >>> http://www.stata.com/statalist/archive/2012-08/msg00256.html >>> >>> and the links within. >>> >>> Scott >>> >>> >>> On Sun, Feb 16, 2014 at 9:15 PM, Lulu Zeng <luluzengnz@gmail.com> wrote: >>>> Dear Statalist, >>>> >>>> I am seeking help with taking draws from a known, non-regular (not >>>> normal or lognormal etc), discrete distribution. >>>> >>>> For example, taking draws from a distribution like the one below. >>>> However, in my case I have 1,200 points instead of the 4 points given >>>> in the example. >>>> >>>> Draw value Probability >>>> >>>> 0.5 0.15 >>>> >>>> 0.6 0.30 >>>> >>>> 0.2 0.25 >>>> >>>> 0.9 0.30 >>>> >>>> The "draw value" is the value to be drawn, "probability" is the chance >>>> each value be drawn, so it adds up to 1. >>> * >>> * For searches and help try: >>> * http://www.stata.com/help.cgi?search >>> * http://www.stata.com/support/faqs/resources/statalist-faq/ >>> * http://www.ats.ucla.edu/stat/stata/ >> * >> * For searches and help try: >> * http://www.stata.com/help.cgi?search >> * http://www.stata.com/support/faqs/resources/statalist-faq/ >> * http://www.ats.ucla.edu/stat/stata/ > * > * For searches and help try: > * http://www.stata.com/help.cgi?search > * http://www.stata.com/support/faqs/resources/statalist-faq/ > * http://www.ats.ucla.edu/stat/stata/ * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/faqs/resources/statalist-faq/ * http://www.ats.ucla.edu/stat/stata/