Changes in variables instead of levels

[thomas1978]

I have a panel dataset consisting of over 10,000 firms and lasting 20 years.

I need to run a regression of a dependent variable on 10 independent variables that looks at the changes in the variables instead of levels.

Can anyone explain me what this means?

[Dason]

It's not really clear to me what you want. Then again it doesn't sound like it's clear to you what you want. What do you want to do exactly, what is causing you troubles, and if you don't know exactly what you want to do then why do you want to do it?