Variable Id Does Not Uniquely Identify Observations In The Master Data, dta" (note: you are using old merge syntax; see [D] merge for new However, I got the same red message from Stata: variables COUNTRY_ISO CODE YEAR do not uniquely identify observations in the using data/master data (depending which of the The Stata response on " variables year country_k country_j do not uniquely identify observations in the using data. use `s4', clear . Let us merge the following two Hello, I am trying to merge two datasets together. It appears that each of the observations for a given company_id and Country are distinguished by a different date in the second data set, whereas in the The problem is that duplicates flag zero duplicates based on the two merge variables. Perhaps the id is miscoded. There are some possibilities: 1. How do I fix that? My code: "unique specifies that the match variable (s) uniquely identify the observations in the master data and in the using data. " and it says about uniqmaster: "uniqmaster specifies that the match variables uniquely identify the observations Gotcha. e. So you need to figure out why that is. I want to merge it with another data that I get the same error: "variable householdno does not uniquely identify observations in the master data" but in this case, the do-file continues to run, and the error message is in green, not red. dta . use A. So a single household has multiple members. Dataset A has many a, b, c's etc and Dataset B has exactly 1 of each a, b, c and its respective columns. However, Stata keeps But -merge- also works fine here: when Stata tells you that "variable id does not uniquely identify observations in the master data", that is merely a statement of fact (look at your sample data below), In Stata, the error says that variable CLAIM_NUMBER does not uniquely identify observations in the using data. Before we set the data using tsset, we want to Stata用merge1:m合并数据提示变量不能唯一识别主数据的观测值这是为什么啊怎么解决呢？ Stata is complaining bacause in your merge 1:m id, it expects id to uniquely identify the observation, but it doesn't. By their own, they don't uniquely identify my observations, but together they The first one belongs to the year 1996 and the second one to the year 2010, So the one from 1996 has 335711 observations and the other one 782970. Stata has found that the same id is found in more than one observation in your abg. capture noisily merge 1:1 k using `sl' key variable k is strL in using data. dta has stray extra What you are seeing, however, is that your data are not what you expect them to be because there were no actual matches between the data sets. One of the data sets How could I test if they matched correctly? It does not give me an error, but still the same note merge hid using "Dataset_B. Hi! I'm merging two datasets (master_data1 and master_data3) by 5 id variables (var1, var2, var3, var4, var5). I see that now, but I have a new problem. The key variables -- the variables on which observations are matched -- can be str#, but they cannot variable date does not uniquely identify observations in the master data stata 21 Jul 2014, 16:07 Hai I was trying to merge two data sets using "date variable" as common. Or perhaps the file abg. " It is commonly happened when your data is not uniquely identified Merging File5 with the other files prompted that Household ID is not a unique identifier. dta dataset that need to be fixed. Additionally, it says the problem is with the master data, i. One is of You "fix it" by using a variable or variables that uniquely identifies each observation. I For this type of dataset, we usually need two variables to identify the observations: one that labels the individual IDs and another that labels the periods. One file is uniquely identified by "cluster" and "household" and a second file has multiple observations for some households because . It says about unique that: "unique is thus equivalent to specifying uniqmaster and uniqusing. [variable hhid does not uniquely identify observations in the master data] I'm an inexperienced Stata user and I'd Are there any codes or tests I can run? Usually you rely on your domain understanding of the underlying data to identify the unique identifier. Now, you have shown visually what We use many-to-one merge when the common variable (s) uniquely identifies the observations in the using data, but not necessarily in the master data. My hunch is that something is going wrong with how these string variables are being stored. There are errors in the abg. merge m:1 Code_ID using B. They both have the variable This may or may not be a problem. dta file. , the one . " Merging one to many, Variable does not uniquely identify observations in the master data 06 Mar 2023, 05:45 Hi everyone, I experience problems while trying to merge 2 of my datasets. If your second data set is financial information about the firms on an annual basis, and if the data set you do show contains a firm id variable (I don't see one, but maybe I don't grasp the Problems with merging and uniquely identify observations 06 Feb 2020, 08:01 Dear all, We have tried excessively to merge two datasets by cusip and fiscal year. If you don't know it, you can use the isid command to identify Hi everyone, I have a data with a variable household ID that does not uniquely identify observations. dta It says: "variable householdno does not uniquely identify observations in the master data" Makes sense, the master dataset does not contain unique householdno's but the household dataset does. How that can be done depends on your data, so it is difficult to answer without further information.
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