of course, I tried to find a thread with an answer about my topic. Unfortunately without success.

I ran a multi regression analysis with 8 control variables and one explanatory variables to explain my dependent variable. The date is compiled between the years 1990 and 2000.

Having done that, I found some sources, where it is said: "We use yearly dummy variables to control for yearly effects."

What does that exactly mean? Shall I create dummy variables for each year (11 additional dummies) and put them into my analysis? Or what is it all about "controlling for yearly effects?"

Perhaps my question is on a pretty low level. ;-/

Thanks for any support!

Regards