Regarding coefficient interpretation In a multiple regression. Where I analysis oil demand forecast error. So, the depen

[answerhappygod]

Regarding coefficient interpretation In a multiple regression.
Where I analysis oil demand forecast error. So, the depended
variable is a forecast error in percent. When I have my first
independent variable which is a dummy variable of being a rich
country or being a poor country(OECD or non OECD). My second
independent variable is forecast horizon which is in a scale form
1,2,3,4. Where 1 represent a horizon of 5 years, 2 represent
a horizon of 10 years and so on. I want to be very clear with the
interpretation so will you please answer if my current
interpretation is correct? When having the following result. Also
both estimate is significant different from zero at a five percent
significant level.
Forecast error
=
α0+α2DOCED13+α3h(9)+et
“At a 5% significant level, OCED countries have a
13% point higher forecast error than non-OCED
countries when holding the other IV constant”
“when the forecast horizon increases with one unit forecast
error increase by 9% point”
So the main question is if it is just percent or percentage
point increase or decrease?? I claim that is in percentage point
since to be percentage the IV and DV have to be in percentage but I
am not 100% sure.