Hi there. Firstly,as it is my first ever post, i want to thank everyone for the valuable information on this forum
Secondly ,i am writing a thesis about the effects of some human capital determinants (Education,health,R+D) on economic growth in the EU-27 region. I gathered the panel data from the world bank database ,which i would provide below.My goal is to run some regression with the same dependent variable(gdp) and different independent variables at a time
Do you think that a fixed effect model would be the appropriate model to use or i should use simple and multiple linear regressions models.

Thanks in advance
Dimitrios Markoulis