Help with clarifying fixed effect models?

[Jun Park]

The following is from a research paper that I recently read:

The model includes country fixed-effects to allow any trends in voting behavior to vary from country to country (without fixed-effects, the results are unchanged).

My question is: 1. Doesn't any model allow trends in voting behavior to vary?... Voting behavior is the dependent variable in the model. So of course it's going to change since the time series of the data is 30 years. 2. What does it mean that without fixed effects, the results are unchanged?..

Thank you!

[Carlo Lazzaro]

Jun:
unfortunately, your post provides interested listers with a too scant handful of details.
The only explanation that springs to my mind as per your description, is that the -fe- estimator, as expected wipes out (that is, omits) time-invariant variable, like -country-.