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From |
Francesca Colantuoni <f.colantuoni9@gmail.com> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: how to program an equivalent of "egen mean" for an equation |

Date |
Tue, 30 Apr 2013 17:59:40 -0400 |

Thank you so much Nick! By placing a space between -egen- and `y' it does not give me that error. It gives me other errors (specifically: "option replace not allowed nlh_n6 refused query, rc=198"), but I'll keep on working. Francesca On Tue, Apr 30, 2013 at 9:41 AM, Nick Cox <njcoxstata@gmail.com> wrote: > The specific error here is that you need a space between -egen- and > `y'. Stata is thinking that you are referring to a program or command > > egen__00000F > > and naturally it doesn't exist. (Temporary variable names created by > Stata are all 8 characters long and begin with a double underscore.) > > I haven't look at the rest of your code. > > Nick > njcoxstata@gmail.com > > > On 30 April 2013 14:15, Francesca Colantuoni <f.colantuoni9@gmail.com> wrote: >> I am trying to program a non linear least square function using panel >> data. I have to create a sort of "within estimator" by having the >> estimation routine compute the average of the function for each value >> of the parameters, and such average needs to be plugged back in the >> original function in the following fashion: x_st-(mean)x_st=f(beta, >> gamma) - value_f((mean)beta,(mean)gamma) >> where s=market, t=time. >> While x_st-(mean)x_st is observed and I can compute it, I don't know >> how to implement the mean of the function in the routine, because I >> need to compute it for each estimated value of the parameters, but >> also for each individual (market) of the dataset, over time. I have >> tried this way, but obviously it does not work: >> >> program nlfrncs >> version 12.1 >> >> if "`1'" == "?" { >> global S_1 "w b_ns b_s g2_ns g2_s g3_ns g3_s" >> global w=0 >> global b_ns=-1 >> global b_s=-2 >> global g2_ns=0.5 >> global g2_s=0.5 >> global g3_ns=0.5 >> global g3_s=0.5 >> >> tempvar Y >> quietly { >> by market, sort: >> egen`Y'=mean(ln($w*exp($b_ns*price1+$g2_ns*price2+$g3_ns*price3)+(1-$w)*(y*exp($b_s*price1+$g2_s*price2+$g3_s*price3)+i*exp($b_s*price1+$g2_s*f_price2+$g3_s*f_price3)))) >> , replace >> } >> exit >> >> } >> replace `1'=ln($w*exp($b_ns*price1+$g2_ns*price2+$g3_ns*price3)+(1-$w)*(y*exp($b_s*price1+$g2_s*price2+$g3_s*price3)+i*exp($b_s*price1+$g2_s*f_price2+$g3_s*f_price3)))-`Y' >> end >> >> I get the error: unrecognized command: egen__00000F >> Any suggestion or direction will be greatly appreciated. >> Francesca >> * >> * 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/

**Follow-Ups**:**Re: st: how to program an equivalent of "egen mean" for an equation***From:*Nick Cox <njcoxstata@gmail.com>

**References**:**st: how to program an equivalent of "egen mean" for an equation***From:*Francesca Colantuoni <f.colantuoni9@gmail.com>

**Re: st: how to program an equivalent of "egen mean" for an equation***From:*Nick Cox <njcoxstata@gmail.com>

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