Stata 18 | [2021]

* Best linear regression with robust SE reghdfe y x1 x2, absorb(fe1 fe2) vce(cluster id)

| Situation | Solution | Example | |-----------|----------|---------| | Large panel | xtset, force + xtreg, re | xtset id year, force | | 10M+ obs | use with in or if early | use data if year>2020, clear | | Slow merge | joinby then collapse? | joinby id using other | | Memory blow | compress + recast | recast int id, force | | Loops | forvalues > foreach > while | forvalues i=1/1000 ... | Stata 18

Stata 18 is a major statistical software release that continues StataCorp’s long-standing focus on providing a unified environment for data management, statistical analysis, graphics, and reproducible research. Designed for researchers across economics, epidemiology, biostatistics, social sciences, and public policy, Stata 18 expands functionality, improves performance, and introduces new tools that simplify complex workflows. * Best linear regression with robust SE reghdfe

Perhaps the most theoretically important addition in Stata 18 is the medte (meditation treatment effects) command. * IPW with regression adjustment teffects ipwra (y

Key highlights include the introduction of Causal Mediation Analysis, Vector Autoregressive (VAR) models with heteroskedasticity, and a built-in Markdown editor (Quarto).

* IPW with regression adjustment teffects ipwra (y x1 x2) (treat x1 x2 age), atet