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From |
Erik Aadland <[email protected]> |

To |
<[email protected]> |

Subject |
RE: st: creating variable summarizing for each individual properties of other members of a group at t-1 |

Date |
Wed, 18 May 2011 18:16:04 +0000 |

My apologies for that misunderstanding, Nick. My programming abilities are still modest and I mistakenly believed the code applied to the first problem. However, I am still struggling with both problems as my dataset is also unbalanced. I failed to inform you of this vital information. It did not occur to me that this information would impact the code. I am sorry. So, Jorge's code for the first problem produces the correct variable as long as the data is balanced. When unbalanced ind_ids occur with ind_entry = 1, they are not included in the sums/counts for/of the other ind_ids. See the following example dataset for more precise structure representation. year month yearmonth ind_id ind_entry 2003 11 11 2 0 2003 12 12 2 0 2004 10 22 2 1 2004 11 23 2 0 2004 12 24 2 1 2003 11 11 4 0 2003 12 12 4 1 2004 10 22 4 0 2004 11 23 4 0 2004 12 24 4 0 2003 11 11 56 0 2003 12 12 56 0 2004 1 13 56 1 2004 2 13 56 0 I greatly appreciate your help and input. Kind regards. Erik. ---------------------------------------- > From: [email protected] > To: [email protected] > Date: Wed, 18 May 2011 18:36:37 +0100 > Subject: RE: st: creating variable summarizing for each individual properties of other members of a group at t-1 > > My code > > bysort ind_id (yearmonth) : gen ind_score = sum(ind_entry) > by ind_id : replace ind_score = ind_score == 1 & ind_score[_n-1] != 1 > sort yearmonth > gen all_score = sum(ind_score) > by yearmonth : replace all_score = all_score[_N] > replace all_score = all_score - ind_score > bysort ind_id (yearmonth) : gen prevscore = allscore[_n-1] > > was certainly intended to solve your second problem. I've not tested it. Are you saying it doesn't? And if it doesn't what does it get wrong? > > Nick > [email protected] > > Erik Aadland > > Thank you Nick and Jorge for your suggestions. They were very helpful, and I am very grateful. > > Jorge, your suggested code below worked perfectly for my "first" variable. > > I am still struggling with my "second" variable. In the "second" variable, I am trying to create a variable that for each ind_id counts the total number of other ind_ids, excluding the focal ind_id, in the dataset that have experienced ind_entry =1 at least once up until and including yearmonth -1. In other words, I am trying to create a variable that for each individual tracks the number of other entrants in the dataset up until and including yearmonth -1. I am trying to track ind_ids that have entered, not how many times they have entered. > > Any and all input on this problem would be very much appreciated. > > > * > * 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/

**Follow-Ups**:

**References**:**st: creating variable summarizing for each individual properties of other members of a group at t-1***From:*Erik Aadland <[email protected]>

**Re: st: creating variable summarizing for each individual properties of other members of a group at t-1***From:*Jorge Eduardo Pérez Pérez <[email protected]>

**RE: st: creating variable summarizing for each individual properties of other members of a group at t-1***From:*Erik Aadland <[email protected]>

**RE: st: creating variable summarizing for each individual properties of other members of a group at t-1***From:*Nick Cox <[email protected]>

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