Stata 18 |best|

Windows (64-bit), macOS (Apple Silicon and Intel), and Linux.

This single command replaces hours of manual copy-pasting. Stata 18

: New tools allow for deeper customization of table layouts and styles, which can be exported directly to Word, Excel, or PDF. Windows (64-bit), macOS (Apple Silicon and Intel), and Linux

Stata 18 expands the feature (formerly called "frames" since Stata 16). You can now have up to 1,000 data frames in memory simultaneously. macOS (Apple Silicon and Intel)

Data is rarely homogenous. In many datasets, the population is composed of distinct subgroups that behave differently, but these groups are unobserved. If you analyze such data using standard regression, you are essentially averaging the effects across these groups, potentially finding no effect where strong effects exist.