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stata count unique id Counting unique values Hello fellow Stata users, I am trying to get some summary stats for my data and want to count how many unique samples have the following variable. Each patient responds to a survey and the questions in my survey correspond to variables in my data set. Merging information on a parent who is present in the household to an individual’s order permno cusip cusip_id ecusip_id shrcd ncusip ticker prc ret dup. Counting panels, and more generally groups, is sometimes possible in Stata through a reduction command (e. For instance: id year x1 111 1999 3 111 2000 5 111 2001 6 123 2000 4 123 2001 2 For the above example, there are 2 unique ids (111 and 123). However, it gives up if that number exceeds 99, and it ignores string variables, such as s, by treating them all as missing. If your data does not currently contain such an identifier, you can add an arbitrary one since it is only there for Stata to know which data points go with which individual. Launch Stata and open framingham_1000. Counting duplicates in SPSS works slightly different but is implemented in the menu ("Data\Identify Duplicate Cases"; Shortcut ALT+D+U). In this section we discuss how to read raw data files. j. ac. One annoyance of Stata is that replace doesn’t give you access to the number of changes that are made, so you can’t easily test for whether your replace command made changes. , collapse, contract, statsby)that Overview. In particular, Stata 14 includes a new default random-number generator (RNG) called the Mersenne Twister (Matsumoto and Nishimura 1998), a new function that generates random integers, the ability to generate random numbers from an interval, and several new functions that generate random variates See full list on extendoffice. respondent ID, household number, etc. Explanation: duplicates drop removes duplicates See full list on ssc. That is, we must tell Stata what the panelvar is; in this case it is id. _n is 1 in the first observation, 2 in the second, 3 in the third, and so on. Before you open it in Stata, type “set mem 35m” in the command line. xtset typed with no parameters tells us how the data are xtset. e. I run stata 14 as part of my job, and am trying to find a way to generate a number of unique records for a series of different variables. Stata value labels are not equivalent to pandas categoricals, only close. Data Processing with Stata 14. Panel data refers to data that follows a cross section over time—for example, a sample of individuals surveyed repeatedly for a number of years or data for all 50 states for all Census years. You can use any of these by typing sysuse name. For example, given a variable list such as country state district name, a unique ID is returned for every observation such that: 1. This is important as the count only involves unique segments. While writing a do-file, pay close attention to the following things: Create New, or Modify Existing, Variables: Commands generate/replace and egen. I however need this for every year. _n is Stata notation for the current observation number. Comments are preceded with an asterisk. Since Death == 1, we want to add up the number of Death for each month. log” From the menu bar at top Stata allows you to specify merges like merge m:m id using newdata. 69 42. tab my_var – show a breakdown of values for one variable. 571–581 Speaking Stata: Counting groups, especially panels Nicholas J. EXPLORING THE DATA nce you have your dataset open, you may wish to use Stata to familiarize yourself with it. The table below summarizes some commands required to read and describe datasets. egen newid=group(siteid visits) and This is important as the count only involves unique segments. • reshape There are many ways to organize panel data. The problem is that not all rows have unique IDs so those rows have a junk code of 99999. Everything in Stata is built around this paradigm. . g. Merge newids with the original data file (orig), and get rid of the old id variable. Perfect. ref push unique id in same unique id firebase; count rows in another table group by id number power bi; Since there are not unique IDs in the data, it is also useful to see the list of all duplicates. This is so I can count the number of board memebers. The ID uniquely and fully identify all observations. Method: The method is simple. _N is Stata notation for the total number of observations. by id (time), sort: gen byte duration = sum (event==1) Sorting by the id and then time will nest the time sequence for each id. If we switch the datasets Random numbers in STATA . 5. _N in combination with -bys- gives the total number of observations withing each group defined by the variables in -bys-. number of missing/unique values Stata has 6 data types, and data can also be missing: byte true/false unique id variable (key) I have a dataset where each row is a firm, year pair with a firmid that is a string. ID Variable. uk Abstract. cox@durham. count if price > 5000 count number of rows (observations) Can be combined with logic VIEW DATA ORGANIZATION inspect mpg show histogram of data, number of missing or zero observations summarize make price mpg print summary statistics (mean, stdev, min, max) for variables codebook make price overview of variable type, stats, number of missing Stata by and egen commands. . Sometimes they are even stored numerically. 1392801 0 1 hypertension (1=yes, 0=no) gestwks 641 177 38. This is my code and output: The Stata command to remove duplicates should be chosen carefully. Stata by and egen commands. wisc. To add the duplicate observations, we sort the data by id, then duplicate the first five observations (id = 1 to 5). For a list of topics covered by this series, see the Introduction. In this post I will calculate an Keep one observation for each id. rbinomial(n, p) generates binomial(n, p) random numbers, where n is the number Basic Panel Data Commands in STATA . 97192 23 43 maternal age (years) hyp 639 2 . I describe how to generate random numbers and discuss some features added in Stata 14. Stata has two built-in variables called _n and _N. dta. by and bysort. . One thing is necessary: for Stata the numerical data is still a (text) string and now need to be changed. ") as 1 Be really careful using creating and referencing dummies: gen medicareeligible=(age>65) This will mistakenly categorize anyone with missing age as medicare eligible Use gen medicareeligible=(age>65) if age!=. Stata usually allows you to abbreviate commands, parameters, and variable names to the fewest possible characters needed to uniquely identify the name. dta", clear . e. Earlier we looked at how the Stata by command can be used as a prefix for statistical commands (see help by). 5. The quick answer is that, at some point during the fitting of the model, Stata will have to compute the equivalent of the inverse of the square of year. count duplicates tag cusip_id, gen(dup_3) summ dup_3 /* Note that the maximum number of securities issuances for any single firm on this day is 4. 4 A. 123456792 6. dta> represents the same distinct set of <geofips> <gename> and <year> as <id==1 save data in Stata format, replacing the data if (here, records that contain a number)) 0 6 unique id variable (key) create new variable which captures COUNT THE NUMBER OF DEATHS PER MONTH. The first step is to use the . It should be equivalent to the following SAS command which will identify the number of unique observations by study_id: PROC SORT NODUPKEY DATA=test; BY study_id; RUN; Tom Weichle Math Statistician Center for Management of Complex Chronic Care (CMC3) Hines VA Hospital, Bldg 1, C202 708-202-8387 ext. /Provincialised Colleges and State Universities under Higher Education, Assam (General) One student can generate only 1 (One) unique ID and that Unique ID shall be used in all applications for admission into colleges/universities. So if var1 uniquely identifies individuals within id, than _N within -bys id var1- should always be 1, and any duplicates will be identified with _N larger than 1. com format id %9. In pandas, a label is as good as its underlying integer data type, and so there is no way for a categorical to have 2 values with the same label. The command unique without a by reports the number of unique values for the varlist. isid unique_id_var *Check for expected/necessary variables confirm var expected_var_names * Edit filename /*The filenames in the local "files *i you will be able to run your version of the commands on your dataset, try them. These IDs are coded and nested, based on strata-type variables which uniquely identify the observations. Gonzalo Ignacio Durán Sanhueza has a good solution - however be cautious to ensure that <id==1> in < ResearchGate1. Newly created observations will have missing values for all the other variables and will have a _fillin variable set to 1, but we won't need that variable for this task. if _n!=_N list if _n<10 & count In the second step, the validation dataset includes the 2nd and 6th observation, etc. I tried . This information is located in byte 15 In line 8 we use the command – sample – so STATA randomly select, ins this case, a 50% of the total number of unique ids (- help sample – to see other options, such as defining the number of observations you want to draw from the original set). by gvkey year: egen segmentcount = count(sid) > this command generates a new variable (segmentcount) and gives it the value of the count of the segment id codes (SID) for each company and individual year. makeid creates a unique ID for every observation in the dataset. For example the following Stata code will execute the summarize command for each unique value of marital (married, widowed, etc. 4. edu [mailto:owner-statalist@hsphsun2. For example the following Stata code will execute the summarize command for each unique value of marital (married, widowed, etc. 4 B . Don’t substitute brevity for readability. In STATA, this can be done using the command –bysort– and –gen– (i. by and bysort. 123456792 5. 3 B. Insert “1” to the ﬁrst observation of Sweden. 2001. Take care to select the format “. To create new variables (typically from other variables in your data set, plus some arithmetic or logical expressions), or to modify variables that already exist in your data set, Stata provides two versions of basically the same procedures: Command generate is used if a new variable is to be added to the data set Stata for Researchers: Hierarchical Data. 8) Now there are a few steps left to finalize the Datastream data but not all of it is necessary. For the latest version, open it from the course disk space. It describes data contents but also simply identifies unique values. If we use the describe command, we can see that Stata stored this value with the type float . 123456792 2. We would want to sum up the number of deaths across the months. I’ll be using Stata 14, with a focus on the xt and me commands. count if var > 10 - count how many observations meet certain criteria summarize – show the mean, median, max, min of one or more variables. com In the same light as the other question: I now need unique executive id's over the time period 2002 to 2009 for EVERY year. Check for unique identifiers (ID made of multiple variables) The Multiple Indicator Cluster Survey at Women-level data is used in this example. Type set more off __b) Start a log of your session. 0f list id 1. harvard. Thanks Nick! Your code has a number of additional insights (for me) in it over and above answering the questions. inspect varlist display r(N_unique) Besides reporting the number of unique values, -inspect- also reports: the number of negative, zero, positive, and missing values. Let’s see how _n and _N work. So, we are going to use the r-class returned results from tab command. e. The temptation is to do this: egen uniqueid = concat (country village year household) The problems is that household 1 in year 1960 in village 19 in country 11 will have the same id as household 1 in year 1960 in village 119 in country 1 –> 1119601 for both. ): several variable sets together, and they needed a unique identifier the included information about the source data set. – This document briefly summarizes Stata commands useful in ECON-4570 Econometrics and ECON-6570 Advanced Econometrics. count – report the total number of observations in the dataset. You could do this by creating a dummy variable which codes for child, mother, and father. xtset id year . ): Hi all! I’ve spent a couple of days trying to figure this out and I’m extremely self conscious in terms of my (lack of) stata skills but could really use the help. ) Both data sets must have the same unique id for individuals; both data sets must be sort by id. Simons – This document is updated continually. . *i create a new var count which would have the total number of observations per id *i only label the last observation per id with the count of observations bysort id: gen count =_N bysort id (specimen_date): replace count =. ). Since my dataset has over 6000 observations, what commands should I use to generate a count of unique ids? Count unique values in Stata. The default number of folds is equal to 10, but can be changed using the nfolds() option. To randomize with replicability in Stata, follow these guidelines: Make sure your dataset includes a unique ID (i. rename k12_unique_id sid rename class_unique_id class_id label variable sid "Student ID" label variable class_id "Course ID" d. The order of those distinct cluster relative to previous (earlier) clusters “use forvalues stata” Code Answer’s. With Clyde's command I get the count of unique executvie id's (execid) over the time period 2002 to 2009. The ego-ID does not need to be unique, but the alter-ID should be (though it can be missing). Explaining why is for another day. By default, the fold ID variable is randomly generated such that each fold is of approximately equal size. The dataset is a matrix where each column is a "variable" with a unique name and each row has a number (the special variable _n). g. +-----+ |id ts1 tf1 st1 fail1 ts2 tf2 st2 fail2 ts3 tf3 st3 fail3 educ | The problem with using -tab- to count the unique number of values is its row limits: 12,000 rows (Stata/MP and Stata/SE), 3,000 rows (Stata/IC), or 500 rows (Small Stata). I want to use the brandnames as the panel ID variable, but obviously Stata doesnt accpet a string variable as the panel ID var. Thus, if values of a variable are 1, 2, 2, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, and 5, then in one sense of “unique”, there are five distinct or unique values—namely, 1, 2, 3, 4, and 5—whereas in another sense there is just one unique value—namely, 1, the only value that occurs precisely once. This leads to 195 unique and 5 duplicated observations in the dataset. Looking at the help of the command, it does not seem possible to store this value. Also, if var1 is a constant within unique_id and if var1 is numeric, then it would be more efficient to code: bysort unique_id: egen mean_var1 = mean(var1) replace var1 = mean_var1 if missing(var1) since that would catch all of the missings on var1. Distinct clusters are those sharing a set of dates within an id. This article will introduce you to some of the most useful and easy to use features. autocor cd4res timeyrs id IV. –generate-) or –egen-. IDs can be stored as either (as long as you choose a numeric type that has enough precision—see Working with Data) and it's not uncommon to find that your data sets store the ID in different ways. dta" data in Stata format, replacing the data if unique id variable (key) replace the number 9999 with missing value in all As I understand your question you're actually not looking for a count of unique observations but rather for a count of unique values per character variable. Hierarchical data are data where observations fall into groups or clusters. “use forvalues stata” Code Answer’s. In lines 10-11 we save this subset of ids in a temporary file called randomsampleid. The Stata commands are preceded with a period. com Sometimes this experience has an effect in future decisions, so we calculate variables that measure the number of times a firm has made an acquisition or has invested in a certain industry or country. A solution to that is . Then, stack Detect duplicate observations in a data set in Stata. the xtset command declares the data to be a panel Stata now recognizes the panel variable (“id”) and the time variable (“date”). With this two-step The following Stata code will generate the duration variable. label define command to create a mapping between numeric values and the words or phrases used to describe those values. Many Stata commands can be executed on a group-by-group basis. e. 1 A. by gvkey year: egen segmentcount = count(sid) > this command generates a new variable (segmentcount) and gives it the value of the count of the segment id codes (SID) for each company and individual year. Normally, panel data are in calendar time (i. I want this as a result: Count_A Count_B *i you will be able to run your version of the commands on your dataset, try them. *i create a new var count which would have the total number of observations per id *i only label the last observation per id with the count of observations bysort id: gen count =_N bysort id (specimen_date): replace count =. years). label values command. Your data has 2 values that correspond to the same number. You can check for duplicate observations in Stata in the following ways: The isid command can detect duplicate observations: . STATA generates a 16-digit values over the interval [0, 1) for each case in the data. Cox Department of Geography Durham University Durham City, UK n. Also there can be text in the ID sometimes and it looks like this: D-00000 Replace loop in Stata replace,stata I have two variables: patient id and date. 1 A. In the dataset, the variable id is the unique case identifier. Many Stata commands can be executed on a group-by-group basis. In Stata, you can use the contract command to calculate frequency for variables and save your results into a new data set. savemany-to-one merge of "hh2. if _n!=_N list if _n<10 & count Uh. . See full list on stata. edu excel,count,duplicates I have a column with IDs and I need a count of the unique IDs only. But there are ways to check replace when important — here’s an admittedly verbose way of making sure your replace command is doing what you expect. However, if there are duplicates in alter-ID it won’t provoke an error, but only the last occurrence will be recorded. isid x1 x2 x3; The duplicates command can list and flag duplicate observations. Command Description use filename loads a STATA-format dataset into memory (discussed in Section 2. With a by it does the same, but also creates a new variable (_Unique by default but can be named in the gen option). I have long data with multiple timepoints for each individual with a unique record ID. The second step is to associate a specific mapping with a particular variable using the . bysort id (disease) : keep if _n == _N That keeps the last observation for each distinct id: after sorting within id on disease observations with the disease are necessarily at the end of each group. In Stata, you have one dataset in memory. dta, but it is difficult to imagine a situation where this would be useful. , 80, 81, 82) should be put in the variable called year. If you are thinking about using merge m:m chances are good that you actually need joinby. Earlier we looked at how the Stata by command can be used as a prefix for statistical commands (see help by). 123456792 3. The particularly relevant Stata commands are in bold. Example 3 . 123456792 4. Stata has many tools for working with dates. harvard. Social Security numbers are invariably stored in computers as 888888888, which is to say that they are run together and look a lot like the number 888,888,888. If I do duplicates drop firmid year, force it doesn't delete anything since there are no duplicates (I origi The id variables should uniquely identify observations in at least one dataset If the id variables uniquely identify observations in both datasets, this is a 1-to-1 merge If the id variables uniquely identify observations in only the master dataset, this is a 1-to-many merge In this case, 1) the stub should be inc, which is the variable to be converted from wide to long, 2) i is the id variable, which is the unique identifier of observations in wide form, and 3) j is the year variable that I am going to create – it tells Stata that suffix of inc (i. If you're new to Stata we highly recommend reading the articles in order. 1. 1 B. This is part seven of the Stata for Researchers series. The country names become labels for the “id” variable. The timevar is optional and may or may not be necessary depending on our analysis. count if dup==1 /* Note that this is actually 40 firms since See Programming Cheat Sheet r e r r r r r r e e e e 0 100 200 Number of sunspots 19501850 1900 4 2 0 4 2 0 1970 1980 1990 id 1 id 2 id 3 id 4 4 2 0 wage relative to inflation Blinder-Oaxaca decomposition ADDITIONAL MODELS xtline plot tsline plot instrumental variablesivregress ivreg2 principal components analysispca factor analysisfactor count I have a panel dataset and I wonder if it is possible to generate in Stata a new variable that is the sum of observations for a variable for two of my panels only (ie it is a summation of values within one column). count if price > 5000 count number of rows (observations) Can be combined with logic VIEW DATA ORGANIZATION inspect mpg show histogram of data, number of missing or zero observations summarize make price mpg print summary statistics (mean, stdev, min, max) for variables codebook make price overview of variable type, stats, number of missing The unique hospitalization id can be constructed by concatenating FSU serial number + Segment Number + Second Stage stratum Number + Household Number + Person Number + Hospitalization Number. I want to start a series on using Stata’s random-number function. Using the reshape command requires a few things of your data. 24261 [hidden email] * * For searches and You might consider reconfiguring the data so that your unique identifier is the ID variable. 2 Reading Data Into Stata. 35 gestational age (weeks) Stata stores value labeled variables as labels and some number. For instance: duplicates drop CIK year, force. Stata requires the variables over which we perform the reshape command to be num-bers rather than string. These commands require that the data be organized in the “long form” so that there is one record for each individual at each time point, with an ID number that is the same for all records for the same individual, and a variable that indicates which time point the record comes stata I would like to label how many unique clusters of data are in a longitudinal dataset and have each member of the cluster carry the cluster count. How can i create a variable that defines a unique numbre for every brand name so i can use it as the panel ID var for my paneldata? Thanks a lot for your help. Best, Ben Ben Hoen LBNL Office: 845-758-1896 Cell: 718-812-7589 -----Original Message----- From: owner-statalist@hsphsun2. 123456792 7. 123456792 8. In the example below, every row with siteid from 1 to 62 and visits=3 would refer to person 1, every row with siteid from 1 to 62 and visits=1 would refer to person 2, etc. The concept was formalized early in the development of Computer science and Information systems. The inspect command (see [D] inspect) will report the number of unique values, meaning distinct values, for numeric variables such as n—namely, four—and return it to the user as r(N unique). 2 B. ref push unique id in same unique id firebase; count rows in another table group by id number power bi; STATA can read data from a number of different formats. A Stata date is simply a number, but with the %td format applied Stata will interpret that number as "number of days since January 1, 1960. Adding a value label to a variable in Stata is a two-step process. The list subcommand lists the duplicate observations: . This new variable contains the number of unique values of the varlist for each level of the by variable. Need to merge two data sets? (Two data sets with different different variables on the same individuals. qui count assert `r(N)' == [number_of_expected_observations] // If you know the amount of expected observations *Check that what variables you think sould be unique identifiers are indeed unique. Merging by unique id allows you to combine variables from two different STATA data sets Examples Merging an individual’s employment variables to his/her demographic characteristics Merging the parent’s info to the individual’s demographic file. sort id Stata ships with a number of small datasets, type sysuse dir to get a list. Veillez soigneusement à ce que la méthode utilisée pour générer des ID soit la même pour chaque série de données. 53. " You can then use that number in a variety of ways. Suppose you have the following data: Repair Record 1978 Say the identification variable is Social Security number, an example of which is 888-88-8888. , “Boston” is assigned to more than one observation). age). Number of unique values of mpg is 21. I’ll demonstrate it with an example using the Stata dataset uslifeexp. Convert data from wide to long or vice versa • Two forms of data: wide and long Different models may require different forms of data in Stata. generate randnum = uniform(). codebook is a great command in Stata. panel variable: id (strongly balanced) time variable: year, 1 to 5 The Unique ID shall be used at the time of admission into various Govt. If the number of unique values is large, it becomes difficult to count them manually. That’s a fairly small number and if we multiply it by another small number…well, you get the idea. A unique identifier (UID) is an identifier that is guaranteed to be unique among all identifiers used for those objects and for a specific purpose. The final step is creating the unique ID combination UID with the command: gen UID = CompanyCode+year. I need to assign a unique ID to each person every 62 observations. 535e-07. I usually combine a unique ID code with a specific event year or date. . The command line you use to read your data into STATA will depend on the format that your data is in. To do that, we can use the Stata command -duplicates list-. The syntax for creating indicators of unique cases in While Stata will happily match different kinds of numbers (ints and floats, for example) it can't match numbers and strings. The fillin command ensures there's an observation for each unique combination of the variables it's given, creating new observations as needed. Useful Stata Commands (for Stata versions 13, 14, & 15) Kenneth L. Stata in fact has ten random-number functions: runiform() generates rectangularly (uniformly) distributed random number over [0,1). duplicates list x1 x2 x3 Tag: stata I would like to label how many unique clusters of data are in a longitudinal dataset and have each member of the cluster carry the cluster count. 1 Cheat Sheet For more info see Stata’s reference manual (stata. I have a dataset where I would like to count the number of times different values of a variable occurs but only once for every Id. Sector refers to whether the household is located in the urban sector or rural sector where 1=Rural and 2=Urban. I am trying to replicate a published paper using the authors' data and code, but in one of their do files the command "unique id" is used multiple … Press J to jump to the feed. Store crossref in a safe place since that file can be used with orig2 to determine the identify of the observations. If so then you have to scan the data set per variable. attempt a one-to-many command with the same using and master dataset arrangement, Stata will present an error: The “city_person. 2) 1. Press question mark to learn the rest of the keyboard shortcuts duplicates report fam_id pernum Check whether each record is a unique one sort id time Arrange data in a special order by id: gen n=_n Create an indicator variable for each record of the person or family by id: gen N=_N Calculate the total number of records of the person or family gen marst_r = marst unique (there must only be one observation per identification number). 123456800. Running: fillin id time Working with Dates in Stata. tab my_var, missing – show a breakdown of values for one variable, and don't Variable Obs Unique Mean Min Max Label ----- id 641 641 321 1 641 identity number matage 641 21 33. If you type in: . 5 A. During the merge in step 4, make a file called crossref that shows the correspondence between id and newid. Stata’s responses are not. See full list on stata. 2. For example: . The Stata website is also a repository for datasets used in the Stata manuals and in a number of statistical books. In the current case the timevar is year. edu] On Behalf Of Nick Cox Sent: Friday, January 06, 2012 10:47 AM To: statalist@hsphsun2. First, we have to think about how we want to count death. Many The Stata Journal (2007) 7, Number 4, pp. use "C:\practice1. If id has any observation with value of 1, that is to be kept. com) CC BY NC frequently used commands are highlighted in yellow display price[4] display the 4th observation in price; only works on single values levelsof rep78 display the unique values for rep78 Explore Data duplicates report finds all duplicate Use the name of the program as a command as you use other default Stata commands. For the year 1986 this turns out to be 2. If one doesn't exist yet, create one using the generate command. 3 B. . 6. Assuming that any of the obs within each unique_id have nonmissing on var1. * From top menu bar, at left: FILE > OPEN Tip! At the start of your Stata session, do the following preliminaries __a) In the command line, turn off automatic pausing of output. Josef Brüderl, Useful Stata Commands, SS 2012 Folie 11 Loops Example: Converting EH Data to Panel Data Note: Data are in process time (i. We can do this using the bysort command. The first of these is that each person has a unique identifier, like an ID number. rbeta(a, b) generates beta-distribution beta(a, b) random numbers. Coding in Python is a little different than coding in Stata. Distinct clusters are those sharing a set of dates within an id. Suppose we want to perform a single group time series analysis. 68725 24. You O could begin by opening the data editor, which will show you a spreadsheet-like representation of your data. Thus, we start by assigning each unit—here countries—a unique ID number: (a) Create column for IDs (“unit id”). */ count if dup==. STATA uses a pseudo-random number function uniform() to generate random numbers. keep if shrcd==10 | shrcd==11. My data set comes from patient records that are assigned a unique study id. e. A large number of mistakes are generated from missing values, some important things to remember: Stata treats missing values (\. Put simply, multi-digit variables without leading zeros “squish” together and you risk non-uniqueness (“collision”). Country code in the ID is fully unique 2. dta” dataset fails to provide an id variable that Stata can recognize as a unique identifier (e. The sum () will add all event that is coded as 1. Luckily there are PROC's doing this for us - and they do it normally more efficient than we would code it. For instance, “logit” or “logistic” model in Stata prefers a wide Si vous avez déjà créé un _id unique dans chaque fichier, en utilisant une méthode qui sera cohérente d’un fichier à l’autre, vous pouvez fusionner sur cet id, plutôt que sur un ensemble de variables. ANY help is appreciated. . Therefore, we produce also panel data on an age scale (sequence data). The order of those distinct cluster relative to previous (earlier) clusters creates the desired result. 1234. harvard 12. stata count unique id