Rault, Christophe; Sova, Robert; Sova, Ana Maria - Forschungsinstitut zur Zukunft der Arbeit <Bonn> - 2007
follows
itiitit
zxy εαβ ++=
i = 1,2, …,N, t = 1,2,…,T (1)
, where y
it
is the dependent variable, x … consistent results.
The random model has the same form as before,
Y
it
= â
0
+ â
1
x
it1
+ â
2
x
it2
…………….. +â
k
x
itk … variable:
Cov(x
itk
, á
i
) = 0, t = 1,2,…, T; j =1,2,…, k. (5)
The hypothesis mentioned above is actually less …