Is Unemployment Rate important as a regressor in a cross sectional analysis?

#1
Hello,
I am doing a regression on potential sales and I want to identify the demand drivers. I was wondering if Unemployment rate could be one of them , however i only notice it in panel data regressions in the literature. I have only cross-sectional data (cross-country) and I am afraid that this factor will not tell me much. Any help? Thank you
 

noetsi

No cake for spunky
#2
My suggestion would be 1) create a theory of why it should influence sales immediately (instead of at some point in the future) and 2) run the data and find out. The fact that its never been shown before simply means no one thought it was important - not that it wasn't.
 
#3
Can you describe your data better. What is "potential sales"? I'm guessing you're doing an international or multi-state study otherwise unemployment wouldn't vary in the cross-section.