Introductory Stata 56: Panel Data Descriptive Statistics (xtdescribe, xtsum, xttab)
Today we will explore the descriptive statistics of the panel data. The panel data structure is more complex than cross-sectional or time series, so the descriptive statistics may be challenging to understand. Let's use the long-form panel dataset we saved last time to illustrate panel data's basic concepts and features. You can also download the dataset from the link below. The dataset contains multiple observations of US workers from 2010 to 2018.
https://drive.google.com/file/d/1BfUQ...
First, let's set the panel data by typing "xtset," followed by the panel variable "ID" and the time variable "year."
The command "xtdescribe" tells us about the patterns of the panel data. It is a balanced panel dataset. There are 4,586 workers in the data over five time periods. The distribution of "T_i" tells us all workers are observed for five time periods.
Next, let's examine the summary statistics of the panel data. Panel data have two dimensions, across individuals and over time. An essential feature of the panel data is the between-variation and the within-variation.
#BetweenVariation #WithinVariation #xtsum #xttab #xtdescribe
*************************************
*56. Panel Data Descriptive *
Statistics *
*************************************
capture log close
log using panel2.log, text replace
*Open a panel dataset for US workers
use "https://134997773-924437014403349320....", clear
*Set panel data
xtset ID year
*Describe pattern of panel data
xtdescribe
xtdescribe if lwage!=.
*Summarize panel data
xtsum wagerate
xtsum lwage
xtsum schooling
*Tabulate panel data
xttab union
log close
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