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From |
Luciano Borgoglio <[email protected]> |

To |
[email protected] |

Subject |
st: Choice of bw() in ivreg2 |

Date |
Mon, 25 Apr 2011 14:43:32 -0300 |

Dear Statalisters: How do I choose the bandwith (bw()) option in ivreg2? There's evidence of autocorrelation in the disturbances of 17th order. Then is 17 a good candidate? Thank you all. Luciano 2011/4/25, statalist-digest <[email protected]>: > statalist-digest Monday, April 25 2011 Volume 04 : Number 4133 > > > > ** Send unsubscribe or help commands to [email protected] ** > > The digest contains: > > Re: st: roll rates > st: How to maximize/minimize two equations in Stata > st: Re:Assigning Students Randomly to Classes of Heterogeneous Sizes > st: Problem with infix: record too long > Re: st: Problem with infix: record too long > Re: st: Problem with infix: record too long > Re: st: Problem with infix: record too long > Re: st: Problem with infix: record too long > st: Stata 11 > Re: st: Problem with infix: record too long > Re: st: Problem with infix: record too long > Re: st: How to maximize/minimize two equations in Stata > Re: st: Problem with infix: record too long > st: String function headache. > Re: st: String function headache. > st: what does "no overidentifiying restriction" result mean for estat > overid? > > ---------------------------------------------------------------------- > > Date: Sun, 24 Apr 2011 13:46:51 -0400 > From: Argyn Kuketayev <[email protected]> > Subject: Re: st: roll rates > > thanks, -xttrans- seems to be what I was looking for. > i read that -fillin- command can help woth gaps. > > > > On Sat, Apr 23, 2011 at 8:48 AM, Austin Nichols <[email protected]> > wrote: >> Nick Cox <[email protected]>, Argyn Kuketayev >> <[email protected]>: >> >> -xttrans- does not seem to respect gaps in time within panel, where >> someone estimating transition probabilities would want to, but -tab- >> works fine if you define the appropriate lag variable, and -svy:tab- >> works better, if you have weighted and/or clustered data, or you want >> to test something. >> >> clear >> webuse nlswork >> g lmsp=l.msp >> la var lmsp "last month's state" >> note lmsp: not last month, but actually year(s) >> bys idcode (year): g flmsp=msp[_n-1] >> la var flmsp "last observation's state" >> xttrans msp >> ta flmsp msp, nofr row >> * note equivalence above--not period-to-period transitions: >> ta lmsp msp, nofr row >> svyset, srs >> svy:ta lmsp msp, row >> * usually transition matrix has cols sum to 1: >> svy:ta msp lmsp, col >> test _b[p12]=_b[p21] >> test _b[p11]=_b[p22] >> * the above tests equality of cell proportions... >> * to test equality of transition rates use se or ci options: >> svy:ta msp lmsp, col se >> test _b[p12]=_b[p21] >> test _b[p11]=_b[p22] >> >> >> On Fri, Apr 22, 2011 at 7:58 PM, Nick Cox <[email protected]> wrote: >>> . h xttrans >>> >>> On Sat, Apr 23, 2011 at 12:25 AM, Argyn Kuketayev >>> <[email protected]> wrote: >>> >>>> i wonder if Stata has a package for pool roll rate analysis. >>>> the roll rates are probabilities of transitions between asset's >>>> states, such as credit grades. let's say, we have N assets, each can >>>> be in one of the states S. some of these states are end-states, i.e. >>>> once an asset gets into this state, it exits the pool. >>>> >>>> so we can observe monthly asset states, and transitions between them. >>>> the assumptions is that all assets have the same state transition >>>> probabilities, and that these probabilities remain constant over time >>>> (stationary). i need to estimate the probabilities of transitions >>>> between states. one can think of a matrix with rows corresponding to >>>> an asset state this month, and the columns are states in next month. >>>> so sum of columns in each row is 100%. each cell is a probability of >>>> transition from row state to column state. >>>> >>>> what would be the most straightforward way to estimate the transition >>>> probability matrix (roll rates) in 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/ >> > > > > - -- > Argyn Kuketayev > > * > * 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/ > > ------------------------------ > > Date: Sun, 24 Apr 2011 15:03:56 -0300 (BRT) > From: "Tiago V. Pereira" <[email protected]> > Subject: st: How to maximize/minimize two equations in Stata > > Dear Statalisters, > > I need to solve a problem in Stata, but I am not sure if Stata is capable > of solving that. > > I have checked -nl- and optimize in Mata, but I am not sure if they do > what I am looking for. > > > The problem I have is the following: > > (a*b+(1-a)*c)/((a^2)*d+((1-a)^2)*e+2*a*(1-a)*f) = X > > ((a^2)*d+((1-a)^2)*e+2*a*(1-a)*f) = Y > > I need to compute the single parameter "a" in both equations 1 and 2 that > provides the largest value of X, while giving the smallest possible value > of Y. I have all remaining values: b,c,d,e and f. > > I am asking you this question because I saw that both -nl- and optimize > set each equation to a specific value. In my case, I don't know the value > of X and Y. I am just interested in the largest possible value of X with > the smallest possible value of Y. > > > I will be very grateful if you could provide me some advice/references. > > All the best, > > Tiago > > > > > > > > * > * 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/ > > ------------------------------ > > Date: Sun, 24 Apr 2011 12:29:34 -0600 > From: Mike Lacy <[email protected]> > Subject: st: Re:Assigning Students Randomly to Classes of Heterogeneous > Sizes > > Andy Baxter <[email protected]> wrote: > > >I am using Stata 11 on a dataset of students and their class > >assignments that is structured like this: > > > >_studentid _year _school _grade _classid > > > >Now, I want to randomly assign the students to classes--within the > >same year, school, and grade--while keeping the existing class sizes > >the same. > > > >I would be grateful for any code that would accomplish this. > > > >Thanks, > > > > If I understand the question correctly, this can be accomplished by > permuting the class listings > within year, school, and grade, and merging them back onto the original > data. > > // example data > clear > set obs 60 > gen int id = _n > gen byte year = 1 + int(2 * runiform()) > gen byte school = 1 + int(2 * runiform()) > gen byte grade = 1 + int(3 * runiform()) > gen byte class = 1 + int(5 * runiform()) > // > // A little program to save the data that saves the data that > - -permute- feeds it. > cap prog drop saveit > prog saveit, rclass > args file > keep id class > rename class newclass > save `file', replace > return scalar something = -1 // permute wants something > end > // > tempfile temp > permute class r(something), reps(1) strata(year school grade): saveit `temp' > merge 1:1 id using `temp' > // eyeball to check > sort year school grade > edit > > Regards, > > =-=-=-=-=-=-=-=-=-=-=-=-= > Mike Lacy, Assoc. Prof. > Soc. Dept., Colo. State. Univ. > Fort Collins CO 80523 USA > (970)-491-6721 > > > * > * 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/ > > ------------------------------ > > Date: Sun, 24 Apr 2011 15:42:02 -0300 > From: =?ISO-8859-1?Q?Barbara_Guimar=E3es?= <[email protected]> > Subject: st: Problem with infix: record too long > > Dear statlisters, > > I'm having trouble reading data with infix. I am using Stata 11.1 for > Windows. > > I received the "record too long" error, and I subsequently read the > thread "Re:st:reading data with infix: record too long" (as of 2003 > and 2008), then checked my data set with -hexdump, analyze- but I > don't know what to do now. > > The number of lines in my dataset is 3,972,429, but Stata is only > reading 2,513,116 lines. I have also tried to open the dataset using a > text editor to see if I could do something about it (my data set > format is .TXT), but its not opening due to its size. > I have alos tested reading the dataset wiht only one or two variables, > but in all cases Stata only brings part of the sata set and I receive > the "record too long" error. > > I do believe it is not a memory issue, because I had previously read > another dataset in Stata, which was as large as this one, with no > problems. The dataset I'm having trouble with reading is in Binary > format, and I don't know if this is the cause of the error or not (the > other dataset is ASCII format). > > What are the possibilities, if any, to integraly read this file in > Stata? I would need to merge both datasets afterwards, would it be > possible? > > Thanks and regards, > > Barbara > * > * 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/ > > ------------------------------ > > Date: Sun, 24 Apr 2011 19:45:35 +0100 > From: Nick Cox <[email protected]> > Subject: Re: st: Problem with infix: record too long > > 2011/4/24 Barbara Guimarães <[email protected]>: >> Dear statlisters, >> >> I'm having trouble reading data with infix. I am using Stata 11.1 for >> Windows. >> >> I received the "record too long" error, and I subsequently read the >> thread "Re:st:reading data with infix: record too long" (as of 2003 >> and 2008), then checked my data set with -hexdump, analyze- but I >> don't know what to do now. >> >> The number of lines in my dataset is 3,972,429, but Stata is only >> reading 2,513,116 lines. I have also tried to open the dataset using a >> text editor to see if I could do something about it (my data set >> format is .TXT), but its not opening due to its size. >> I have alos tested reading the dataset wiht only one or two variables, >> but in all cases Stata only brings part of the sata set and I receive >> the "record too long" error. >> >> I do believe it is not a memory issue, because I had previously read >> another dataset in Stata, which was as large as this one, with no >> problems. The dataset I'm having trouble with reading is in Binary >> format, and I don't know if this is the cause of the error or not (the >> other dataset is ASCII format). >> >> What are the possibilities, if any, to integraly read this file in >> Stata? I would need to merge both datasets afterwards, would it be >> possible? >> >> Thanks and regards, >> >> Barbara >> * >> * 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/ > > ------------------------------ > > Date: Sun, 24 Apr 2011 19:52:24 +0100 > From: Nick Cox <[email protected]> > Subject: Re: st: Problem with infix: record too long > > - -infix- cannot read binary files. > > .txt is just a file extension that is commonly assigned to ASCII > files; if the file is binary, calling it .txt won't make it so. > > Showing us the first few lines of the file might give us a clue. > > Nick > >> 2011/4/24 Barbara Guimarães <[email protected]>: >> >>> I'm having trouble reading data with infix. I am using Stata 11.1 for >>> Windows. >>> >>> I received the "record too long" error, and I subsequently read the >>> thread "Re:st:reading data with infix: record too long" (as of 2003 >>> and 2008), then checked my data set with -hexdump, analyze- but I >>> don't know what to do now. >>> >>> The number of lines in my dataset is 3,972,429, but Stata is only >>> reading 2,513,116 lines. I have also tried to open the dataset using a >>> text editor to see if I could do something about it (my data set >>> format is .TXT), but its not opening due to its size. >>> I have alos tested reading the dataset wiht only one or two variables, >>> but in all cases Stata only brings part of the sata set and I receive >>> the "record too long" error. >>> >>> I do believe it is not a memory issue, because I had previously read >>> another dataset in Stata, which was as large as this one, with no >>> problems. The dataset I'm having trouble with reading is in Binary >>> format, and I don't know if this is the cause of the error or not (the >>> other dataset is ASCII format). >>> >>> What are the possibilities, if any, to integraly read this file in >>> Stata? I would need to merge both datasets afterwards, would it be >>> possible? > > * > * 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/ > > ------------------------------ > > Date: Sun, 24 Apr 2011 16:24:29 -0300 > From: =?ISO-8859-1?Q?Barbara_Guimar=E3es?= <[email protected]> > Subject: Re: st: Problem with infix: record too long > > Dear Nick, unfortunetly, I'm not being able to open the file with any > word processor (I believe that it is because of its size / this > dataset was provided by an government organization, so I already > received it in .txt format and don't have access to the primary data) > > > However, the output of the hexdump analyze was: > > >>> . hexdump TS_QUEST_ALUNO.txt, analyze > > > Line-end characters Line > length (tab=1) > > \r\n (Windows) 2,517,361 > minimum 0 > > \r by itself (Mac) 686,626 > maximum 20,971,542 > > \n by itself (Unix) 768,441 > > Space/separator characters Number of > lines 3,972,429 > > [blank] 112,067,613 > EOL at EOF? no > > [tab] 707,187 > > [comma] (,) 765,547 Length > of first 5 lines > > Control characters > Line 1 120 > > binary 0 30,611,037 > Line 2 120 > > CTL excl. \r, \n, \t 19,330,367 > Line 3 120 > > DEL 367,820 > Line 4 120 > > Extended (128-159,255) 21,370,596 Line 5 > 120 > > ASCII printable > > A-Z 149,642,323 > > a-z 16,234,081 > File format BINARY > > 0-9 53,967,247 > > Special (!@#$ etc.) 28,963,365 > > Extended (160-254) 54,882,559 > > --------------- > > Total 495,399,531 > > > > Observed were: > > \0 ^A ^B ^C ^D ^E ^F ^G ^H \t \n ^K ^L \r ^N ^O ^P ^Q ^R ^S ^T ^U ^V ^W > > ^X ^Y ^Z Esc 28 29 30 31 blank ! " # $ % & ' ( ) * + , - . / 0 1 2 3 4 > 5 > > 6 7 8 9 : ; < = > ? @ A B C D E F G H I J K L M N O P Q R S T U V W X Y > > Z [ \ ] ^ _ ` a b c d e f g h i j k l m n o p q r s t u v w x y z { | } > > ~ DEL 128 E^A E^B E^C E^D E^E E^F E^G E^H E^I E^J E^K E^L E^M E^N E^O > > E^P E^Q E^R E^S E^T E^U E^V E^W E^X E^Y E^Z 155 156 157 158 159 160 ¡ ¢ > > £ ¤ ¥ ¦ § ¨ © ª « ¬ ® ¯ ° ± ² ³ ´ µ ¶ · ¸ ¹ º » ¼ ½ ¾ ¿ À Á Â Ã Ä Å Æ > > Ç È É Ê Ë Ì Í Î Ï Ð Ñ Ò Ó Ô Õ Ö × Ø Ù Ú Û Ü Ý Þ ß à á â ã ä å æ ç è é ê > > ë ì í î ï ð ñ ò ó ô õ ö ÷ ø ù ú û ü ý þ 255 > > > Is there any way I could transform this dataset in a way Stata would > read it entirely? > > > > thank you > > * > * 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/ > > ------------------------------ > > Date: Sun, 24 Apr 2011 16:26:35 -0300 > From: =?ISO-8859-1?Q?Barbara_Guimar=E3es?= <[email protected]> > Subject: Re: st: Problem with infix: record too long > > Dear Nick, unfortunetly, I'm not being able to open the file with any > word processor (I believe that it is because of its size / this > dataset was provided by an government organization, so I already > received it in .txt format and don't have access to the primary data) > > > However, the output of the hexdump analyze was: > >>> . hexdump TS_QUEST_ALUNO.txt, analyze > > > > Line-end characters Line > length (tab=1) > > \r\n (Windows) 2,517,361 > minimum 0 > > \r by itself (Mac) 686,626 > maximum 20,971,542 > > \n by itself (Unix) 768,441 > > Space/separator characters Number of > lines 3,972,429 > > [blank] 112,067,613 > EOL at EOF? no > > [tab] 707,187 > > [comma] (,) 765,547 Length > of first 5 lines > > Control characters > Line 1 120 > > binary 0 30,611,037 > Line 2 120 > > CTL excl. \r, \n, \t 19,330,367 > Line 3 120 > > DEL 367,820 > Line 4 120 > > Extended (128-159,255) 21,370,596 Line 5 > 120 > > ASCII printable > > A-Z 149,642,323 > > a-z 16,234,081 > File format BINARY > > 0-9 53,967,247 > > Special (!@#$ etc.) 28,963,365 > > Extended (160-254) 54,882,559 > > --------------- > > Total 495,399,531 > > > > Observed were: > > \0 ^A ^B ^C ^D ^E ^F ^G ^H \t \n ^K ^L \r ^N ^O ^P ^Q ^R ^S ^T ^U ^V ^W > > ^X ^Y ^Z Esc 28 29 30 31 blank ! " # $ % & ' ( ) * + , - . / 0 1 2 3 4 > 5 > > 6 7 8 9 : ; < = > ? @ A B C D E F G H I J K L M N O P Q R S T U V W X Y > > Z [ \ ] ^ _ ` a b c d e f g h i j k l m n o p q r s t u v w x y z { | } > > ~ DEL 128 E^A E^B E^C E^D E^E E^F E^G E^H E^I E^J E^K E^L E^M E^N E^O > > E^P E^Q E^R E^S E^T E^U E^V E^W E^X E^Y E^Z 155 156 157 158 159 160 ¡ ¢ > > £ ¤ ¥ ¦ § ¨ © ª « ¬ ® ¯ ° ± ² ³ ´ µ ¶ · ¸ ¹ º » ¼ ½ ¾ ¿ À Á Â Ã Ä Å Æ > > Ç È É Ê Ë Ì Í Î Ï Ð Ñ Ò Ó Ô Õ Ö × Ø Ù Ú Û Ü Ý Þ ß à á â ã ä å æ ç è é ê > > ë ì í î ï ð ñ ò ó ô õ ö ÷ ø ù ú û ü ý þ 255 > > Thank you > > Rgds, > Barbara > > * > * 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/ > > ------------------------------ > > Date: Sun, 24 Apr 2011 16:52:16 -0300 > From: =?ISO-8859-1?Q?Barbara_Guimar=E3es?= <[email protected]> > Subject: st: Stata 11 > > * > * 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/ > > ------------------------------ > > Date: Sun, 24 Apr 2011 17:36:14 -0300 > From: =?ISO-8859-1?Q?Barbara_Guimar=E3es?= <[email protected]> > Subject: Re: st: Problem with infix: record too long > > Dear Nick, unfortunetly, I'm not being able to open the file with any > word processor (I believe that it is because of its size / this > dataset was provided by an government organization, so I already > received it in .txt format and don't have access to the primary data) > > However, the output of the hexdump analyze was: > >>> hexdump TS_QUEST_ALUNO.txt, analyze > > Line-end characters > Line length (tab=1) > \r\n (Windows) 2,517,361 > minimum 0 > \r by itself (Mac) 686,626 > maximum 20,971,542 > \n by itself (Unix) 768,441 > > Space/separator characters Number > of lines 3,972,429 > [blank] 112,067,613 > EOL at EOF? no > [tab] 707,187 > [comma] (,) 765,547 > Length of first 5 lines > > Control characters > Line1 120 > binary 0 30,611,037 > Line2 120 > CTL excl. \r, \n, \t 19,330,367 > Line 3 120 > DEL 367,820 > Line 4 120 > Extended (128-159,255) 21,370,596 Line 5 > 120 > > ASCII printable > A-Z 149,642,323 > a-z 16,234,081 > File format BINARY > 0-9 53,967,247 > Special (!@#$ etc.) 28,963,365 > Extended (160-254) 54,882,559 > --------------- > Total 495,399,531 > > > Observed were: > \0 ^A ^B ^C ^D^E ^F ^G ^H \t \n ^K ^L \r ^N ^O ^P ^Q ^R ^S ^T ^U ^V ^W > ^X ^Y ^Z Esc28 29 30 31 blank ! " # $ % & ' ( ) * + , - . / 0 1 2 3 4 5 > 6 7 8 9 : ;< = > ? @ A B C D E F G H I J K L M N O P Q R S T U V W X Y > Z [ \ ] ^ _ `a b c d e f g h i j k l m n o p q r s t u v w x y z { | } > ~ DEL 128 E^AE^B E^C E^D E^E E^F E^G E^H E^I E^J E^K E^L E^M E^N E^O > E^P E^Q E^RE^S E^T E^U E^V E^W E^X E^Y E^Z 155 156 157 158 159 160 ¡ ¢ > £ ¤ ¥ ¦ § ¨ ©ª « ¬ ® ¯ ° ± ² ³ ´ µ ¶ · ¸ ¹ º » ¼ ½ ¾ ¿ À Á Â Ã Ä Å Æ > Ç È É Ê Ë Ì ÍÎ Ï Ð Ñ Ò Ó Ô Õ Ö × Ø Ù Ú Û Ü Ý Þ ß à á â ã ä å æ ç è é ê > ë ì í î ï ð ñò ó ô õ ö ÷ ø ù ú û ü ý þ 255 > > Is there any way I could transform this dataset in a way Stata would > read it entirely? > > thank you > > Barbara > > > - -infix- cannot read binary files. > > .txt is just a file extension that is commonly assigned to ASCII > files; if the file is binary, calling it .txt won't make it so. > > Showing us the first few lines of the file might give us a clue. > > Nick > > >> 2011/4/24 Barbara Guimarães <[email protected]>: >> > > >>> I'm having trouble reading data with infix. I am using Stata 11.1 for >>> Windows. >>> >>> I received the "record too long" error, and I subsequently read the >>> thread "Re:st:reading data with infix: record too long" (as of 2003 >>> and 2008), then checked my data set with -hexdump, analyze- but I >>> don't know what to do now. >>> >>> The number of lines in my dataset is 3,972,429, but Stata is only >>> reading 2,513,116 lines. I have also tried to open the dataset using a >>> text editor to see if I could do something about it (my data set >>> format is .TXT), but its not opening due to its size. >>> I have alos tested reading the dataset wiht only one or two variables, >>> but in all cases Stata only brings part of the sata set and I receive >>> the "record too long" error. >>> >>> I do believe it is not a memory issue, because I had previously read >>> another dataset in Stata, which was as large as this one, with no >>> problems. The dataset I'm having trouble with reading is in Binary >>> format, and I don't know if this is the cause of the error or not (the >>> other dataset is ASCII format). >>> >>> What are the possibilities, if any, to integraly read this file in >>> Stata? I would need to merge both datasets afterwards, would it be >>> possible? > > * > * 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/ > > ------------------------------ > > Date: Sun, 24 Apr 2011 17:54:24 -0300 > From: =?ISO-8859-1?Q?Barbara_Guimar=E3es?= <[email protected]> > Subject: Re: st: Problem with infix: record too long > > Dear Nick, unfortunetly, I'm not being able to open the file with any > word processor (I believe that it is because of its size / this > dataset was provided by an government organization, so I already > received it in .txt format and don't have access to the primary data) > > However, the output of the hexdump analyze was: >>> . hexdump TS_QUEST_ALUNO.txt, analyze > > Line-end characters Line lenght > (tab=1) > \r\n (Windows) 2,517,361 minimum > 0 > \r by itself (Mac) 686,626 > maximum 20,971,542 > \n by itself (Unix) 768,441 > > Space/separator characters Number of > lines 3,972,429 > [blank] 112,067,613 EOL > at EOF? no > [tab] 707,187 > [comma] (,) 765,547 Length > of first 5 lines > > Control characters > Line 1 120 > binary 0 30,611,037 > Line 2 120 > CTL excl. \r, \n, \t 19,330,367 Line > 3 120 > DEL 367,820 > Line 4 120 > Extended (128-159,255) 21,370,596 Line5 > 120 > ASCII printable > A-Z 149,642,323 > a-z 16,234,081 > File format BINARY > 0-9 53,967,247 > Special (!@#$ etc.) 28,963,365 > Extended (160-254) 54,882,559 > ------------------ > Total 495,399,531 > > Observed were: > \0^A^B^C^D^E^F^G^H\t\n^K^L\r ^N^O^P^Q^R^S^T^U^V^W > ^X^Y^Z Esc 28 29 30 31 blank ! " # $ % & ' () * +, -./ 0 1 2 3 4 5 > 6 7 8 9 : ; < = > ? @ A B C D E F G H I J K L M N O P Q R S T U V W X Y > Z [\] > > Is there any way I could transform this dataset in a way Stata would > read it entirely? > > thank you and regards, > Barbara > * > * 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/ > > ------------------------------ > > Date: Sun, 24 Apr 2011 23:02:08 +0100 > From: Mauricio Esteban Cuak <[email protected]> > Subject: Re: st: How to maximize/minimize two equations in Stata > > Hi Tiago, > > I am by no means an expert in optimisation, but you seem to have an > ill-defined problem, since you're trying to optimise with two > objectives in mind. > You could try separately maximising X and minimising Y and checking if > you get the same a. > Otherwise, you need to put some weights on the two objectives. > Say, you could maximize: > > t*X - k*Y > Where t and k can be 1 of course. > > Best, > > M > > 2011/4/24 Tiago V. Pereira <[email protected]>: >> Dear Statalisters, >> >> I need to solve a problem in Stata, but I am not sure if Stata is capable >> of solving that. >> >> I have checked -nl- and optimize in Mata, but I am not sure if they do >> what I am looking for. >> >> >> The problem I have is the following: >> >> (a*b+(1-a)*c)/((a^2)*d+((1-a)^2)*e+2*a*(1-a)*f) = X >> >> ((a^2)*d+((1-a)^2)*e+2*a*(1-a)*f) = Y >> >> I need to compute the single parameter "a" in both equations 1 and 2 that >> provides the largest value of X, while giving the smallest possible value >> of Y. I have all remaining values: b,c,d,e and f. >> >> I am asking you this question because I saw that both -nl- and optimize >> set each equation to a specific value. In my case, I don't know the value >> of X and Y. I am just interested in the largest possible value of X with >> the smallest possible value of Y. >> >> >> I will be very grateful if you could provide me some advice/references. >> >> All the best, >> >> Tiago >> >> >> >> >> >> >> >> * >> * 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/ > > ------------------------------ > > Date: Mon, 25 Apr 2011 01:41:09 +0100 > From: Nick Cox <[email protected]> > Subject: Re: st: Problem with infix: record too long > > Your last question is, in effect, can I explain to you how to read a > binary file with unspecified structure into Stata, and the short > answer is sorry, no. > > It's a rare word processor that can open large binary files with > success. Word processors accept a range of formats for documents, > tending to prefer their own proprietary format, but are usually > useless at reading binary data files. A good text editor could do it; > that does not include the proprietary editors bundled with MS Windows. > > I wonder if you are being misled by the first line in the help for > - -infix- below, while overlooking the second line, which is vital. > > "infix reads into memory from a disk dataset that is not in Stata > format. infix requires > that the data be in fixed-column format." > > As you reported, Stata is seeing far fewer end-of-line character pairs > \r\n than lines in this file, \r and \n characters are occurring by > themselves, which is not standard for text files in MS Windows, and > - -hexdump- is labelling this binary. It' s unlikely to be wrong on > that. > > You could try just > > . type filename.txt > > in Stata and that might show you, and us, the first few lines of the > file. They might be recognisable to someone as in a particular format. > > I think if you can't get an idea of what the structure of this file > is, then you have no way to read it into Stata. Why a "government > organisation" is providing a binary file and calling a .txt I cannot > explain. You may need to talk to them. > > Nick > > 2011/4/24 Barbara Guimarães <[email protected]>: >> Dear Nick, unfortunetly, I'm not being able to open the file with any >> word processor (I believe that it is because of its size / this >> dataset was provided by an government organization, so I already >> received it in .txt format and don't have access to the primary data) >> >> >> However, the output of the hexdump analyze was: >> >> >>>> . hexdump TS_QUEST_ALUNO.txt, analyze >> >> >> Line-end characters Line >> length (tab=1) >> >> \r\n (Windows) 2,517,361 >> minimum 0 >> >> \r by itself (Mac) 686,626 >> maximum 20,971,542 >> >> \n by itself (Unix) 768,441 >> >> Space/separator characters Number of >> lines 3,972,429 >> >> [blank] 112,067,613 >> EOL at EOF? no >> >> [tab] 707,187 >> >> [comma] (,) 765,547 Length >> of first 5 lines >> >> Control characters >> Line 1 120 >> >> binary 0 30,611,037 >> Line 2 120 >> >> CTL excl. \r, \n, \t 19,330,367 >> Line 3 120 >> >> DEL 367,820 >> Line 4 120 >> >> Extended (128-159,255) 21,370,596 Line 5 >> 120 >> >> ASCII printable >> >> A-Z 149,642,323 >> >> a-z 16,234,081 >> File format BINARY >> >> 0-9 53,967,247 >> >> Special (!@#$ etc.) 28,963,365 >> >> Extended (160-254) 54,882,559 >> >> --------------- >> >> Total 495,399,531 >> >> >> >> Observed were: >> >> \0 ^A ^B ^C ^D ^E ^F ^G ^H \t \n ^K ^L \r ^N ^O ^P ^Q ^R ^S ^T ^U ^V >> ^W >> >> ^X ^Y ^Z Esc 28 29 30 31 blank ! " # $ % & ' ( ) * + , - . / 0 1 2 3 4 >> 5 >> >> 6 7 8 9 : ; < = > ? @ A B C D E F G H I J K L M N O P Q R S T U V W X >> Y >> >> Z [ \ ] ^ _ ` a b c d e f g h i j k l m n o p q r s t u v w x y z { | >> } >> >> ~ DEL 128 E^A E^B E^C E^D E^E E^F E^G E^H E^I E^J E^K E^L E^M E^N E^O >> >> E^P E^Q E^R E^S E^T E^U E^V E^W E^X E^Y E^Z 155 156 157 158 159 160 ¡ >> ¢ >> >> £ ¤ ¥ ¦ § ¨ © ª « ¬ ® ¯ ° ± ² ³ ´ µ ¶ · ¸ ¹ º » ¼ ½ ¾ ¿ À Á Â Ã Ä Å >> Æ >> >> Ç È É Ê Ë Ì Í Î Ï Ð Ñ Ò Ó Ô Õ Ö × Ø Ù Ú Û Ü Ý Þ ß à á â ã ä å æ ç è é >> ê >> >> ë ì í î ï ð ñ ò ó ô õ ö ÷ ø ù ú û ü ý þ 255 >> >> >> Is there any way I could transform this dataset in a way Stata would >> read it entirely? >> > > * > * 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/ > > ------------------------------ > > Date: Sun, 24 Apr 2011 23:45:28 -0400 > From: Scott Talkington <[email protected]> > Subject: st: String function headache. > > I just can't seem to make this work. What I want to do is search for > any occurrence of the "#" character in a string variable and set a flag > for that observation. I'm searching 6 different strings labeled > something like mystring1 mystring2 etc. and the flags are mynumber1 > mynumber2 etc.. > > So my do file: > > forvalues x=1/6 { > foreach y in # { > replace mynumber `x'= strmatch(mistring`x', "`y'") > } > } > > I just listed one character in the y list above, but in reality I'm not > having a problem with normal strings like "APT" but with wildcards and > with the number sign character itself. > > I assumed that placing a "?" character iyn the search string (s2) would > match zero or one characters + the "#" but it seems to be matching all > strings with one character that are either a number or a letter. Huh? > > If I include the wildcard (either the asterisk or the question mark) > *anywhere* (either in the "foreach" part of the do file or in the > "replace" command) it just doesn't work the way I expect it to. There's > a difference between what I get depending on how many quotes I use and > where as well, but I'm just not getting anything that does what I want > it to. I've even tried using the backslash character to indicate that I > don't want the "#" to be read as an operator, but I'm not even sure > where to put the backslash or how to arrange the quotation marks. It's > driving me nuts. There's some rule here that I'm just not getting. > > - --Scott > * > * 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/ > > ------------------------------ > > Date: Sun, 24 Apr 2011 23:54:32 -0400 > From: Scott Talkington <[email protected]> > Subject: Re: st: String function headache. > > OK, this seemed to work. But I'm not sure... why. :-) > > forvalues x=1/6 { > foreach y in # { > replace mynumber`x'=strmatch(mystring`x',"*`y'*") > } > } > > On 4/24/2011 11:45 PM, Scott Talkington wrote: >> I just can't seem to make this work. What I want to do is search for >> any occurrence of the "#" character in a string variable and set a >> flag for that observation. I'm searching 6 different strings labeled >> something like mystring1 mystring2 etc. and the flags are mynumber1 >> mynumber2 etc.. >> >> So my do file: >> >> forvalues x=1/6 { >> foreach y in # { >> replace mynumber `x'= strmatch(mistring`x', "`y'") >> } >> } >> >> I just listed one character in the y list above, but in reality I'm >> not having a problem with normal strings like "APT" but with wildcards >> and with the number sign character itself. >> >> I assumed that placing a "?" character iyn the search string (s2) >> would match zero or one characters + the "#" but it seems to be >> matching all strings with one character that are either a number or >> a letter. Huh? >> >> If I include the wildcard (either the asterisk or the question mark) >> *anywhere* (either in the "foreach" part of the do file or in the >> "replace" command) it just doesn't work the way I expect it to. >> There's a difference between what I get depending on how many quotes I >> use and where as well, but I'm just not getting anything that does >> what I want it to. I've even tried using the backslash character to >> indicate that I don't want the "#" to be read as an operator, but I'm >> not even sure where to put the backslash or how to arrange the >> quotation marks. It's driving me nuts. There's some rule here that >> I'm just not getting. >> >> --Scott >> * >> * 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/ > > ------------------------------ > > Date: Sun, 24 Apr 2011 20:55:27 -0700 > From: yuanxi zhang <[email protected]> > Subject: st: what does "no overidentifiying restriction" result mean for > estat overid? > > Hello, > > I was doing instrumental variable regression on stata, and tried estat > overid command to test whether the instrument is exogenous. However, > the program shows "no overidentifying restriction", which looks like > an error message to me. Does that mean we should reject the null or > the other way around? > > Thank you very much! > > Brandon Zhang > * > * 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/ > > ------------------------------ > > End of statalist-digest V4 #4133 > ******************************** > > * > * 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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