Stata Panel Data ❲2025-2027❳

: If your entity identifier (e.g., "Country") is a string, you must convert it to a numeric variable. Command: encode country, gen(id)

Declare panel xtset idcode year

): Represents the time periods (e.g., years 2020 through 2025). stata panel data

Stata will output the panel variable, the time variable, and whether the panel is balanced or unbalanced. 2. Exploring Panel Data

xtcd wage hours tenure

* 1. Load and prepare clear all webuse nlswork, clear keep if year >= 70 & year <= 80 drop if missing(ln_wage, hours, tenure, age)

Because panel data has a time dimension, you often need to create lagged or differenced variables. You can do this using Stata's , which work after xtset : : If your entity identifier (e

The xtsum command splits the overall standard deviation into between and within variations: xtsum income education experience Use code with caution. : Variation across the entire dataset.

: Any variable that does not change over time (e.g., gender, country of origin) is dropped from the regression automatically. C. Random Effects Model ( xtreg, re ) You can do this using Stata's , which