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From |
Shikha Sinha <shikha.sinha414@gmail.com> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: policy simulation |

Date |
Wed, 22 Aug 2012 12:39:52 -0700 |

Dear all, I need help in predicting with more than 100 dummies. For example, I want to perform the following steps to capture the policy effect of everyone having access to ORT (ORT=1). (a) y= b0+b1*x1+b2*x2+b3*ORT +b4*d1 +b5*d2.....+b100*d1 (there are 100 dummies for d)- as mentioned by Dan Waldo in the previous post (b) predict y_hat (c) gen policy effect= y_hat-(b1*x1 + b2*x2 + b3 +b4*d1 +b5*d2.....+b100*d1 Is there any shorter way to generate (c) without writing out 100 coeff of d? Thanks, Shikha On Wed, Jul 25, 2012 at 7:12 AM, Dan Waldo <dan_waldo@yahoo.com> wrote: > Maarten's observation from yesterday is quite correct. > But if you mis-spoke and you really want to look at the effect on your dependent variable of everybody having ORT=1, a clunky way to do this (assuming that X1 and X2 are uncorrelated with ORT) would be to use the predict command to generate the estimated y (say, y_hat) and then > > . gen policy_effect =y_hat-(b1*x1 + b2*x2 + b3) [you'd pull the coefficients from the e(b) vector ] > > > > On Tue, Jul 24, 2012 at 2:46 AM, Shikha Sinha wrote: >> I want to conduct a counterfactual policy simulation in state. I >> estimate the following model: >> >> Y = b1X1 + b2X2 +b3ORT +e >> >> ORT is the main independent variable and is binary. The estimated b3 >> coefficient is 0.06. Now I want to answer the counterfactual question: >> what would have been b3 if everyone got access to ORT? How do I get >> this? > > * > * For searches and help try: > * http://www.stata.com/help.cgi?search > * http://www.stata.com/support/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/statalist/faq * http://www.ats.ucla.edu/stat/stata/

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