Hi all. I am using a fixed-effect model to reveal the impact of some factors on the land price (I have observations for 24 countries for 17 years). The code is the following:

global id country
global t year
global ylist land_price
global xlist yields_fruits agr_output input_price real_interest gov_bond inflation
sort $id $t
xtreg $ylist $xlist, fe

Array
But as you may know, besides those factors, there are country policies that changed over time and influenced the land price (e.g., restriction on ownership). I have a few additional variables that describe these changes, but its dummy variables (0 - restricted ownership, 1 - no restrictions) and its values vary over time (data for again 24 countries for 17 years).

The question is how to catch the effect of those policies? Should I control for them or which code what be the most suitable. Thank you