| 104 4 3.0 | | 105 7 | | 104 4 3.0 . Master only (1) | +---+ +---+ | 105 . . 7 Using only (2) | +---+ */ 第二种:one-to-many merge 使用1:m 匹配的条件:用于匹配的 varlist 在 master data 中可以唯一识别每一个样本,且在 using data 中对应多个样本。 常见使用场景: ...
一般不会只出现这2个单词，会有其他的提示
在using d2.dta后，可以通过keepusing()指定合并变量。如，可以在后面加上keepusing(weight)来限定只合...
merge 1:1 pid using other 1. 2. Reversing the roles of the two files would be fine. Choosing which dataset is the master and which is the using matters only if there are overlapping variable names. 1:1 merges are less common than 1:m and m:1 merges. ---Translation:--- (1)Merge...
Stata only allows variable names up to 32 characters long. If you have very long group and/or field names, the first 32 characters could fail to uniquely identify a variable. If you run into this problem, you're using SurveyCTO Desktop to export your data, and group names are included ...
Theiefoie, I decided to use the Aiellano 一 Bond (1991) difference GMM estimatoi fiist proposed by Holtz-Eakin, Newev and Rosen (1988) Instead of using only the exogenous mstiuments listed above lagged levels of the endogenous legiessois 10、in Kit (FDL loans and ponfolio) are also...
above problems, you can use a Stata plugin to import and export your data directly to your database if your database has an application programming interface (API). Most database applications have an API, so the only real question is how to connect Stata to the database by using the API...
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(L(2/4).n would indicate that GMM-type instruments were created using only lags 2, 3, and 4 of n.) After xtabond, estat sargan reports the Sargan test of overidentifying restrictions. . estat sargan Sargan test of overidentifying restrictions H0: overidentifying restrictions are valid chi2(...
Stata:insheet using "auto.csv" R:mydata <- read.csv("auto.csv") 2、改变定义路径 Stata:cd "mydirectory" R:setwd("mydirectory") 3、打印 "hello world" Stata:di "Hello World" R:print("Hello World") 4、列出前五行变量数据 Stata:list in 1/5 ...