As of version 10.64 block scope for variables is supported.

The big question was always, where do you get values for exogenous variables?

After adjusting for other variables, there was also a significant decrease in deaths.

"Very often when you control for other variables the influence disappears."

With indirect fire, it may allow for other variables as well.

A higher level might also not reserve space for unused variables.

It has limited support for private variables using name mangling.

Many Python users don't feel the need for private variables, though.

The gap in the survey results remained after controlling for such variables as race and school performance.

Such qualitative data can also be used for dependent variables.