Parameters of Model
Number of samples:
a0
a1
a2
g0
g1
g2
Statistics Table
(1) $$Y_1 = a_0 + a_1\cdot Y_2 + a_2\cdot X_1 + \epsilon_1$$
(2) $$Y_2 = g_0 + a_1\cdot Y_1 + g_2\cdot X_2 + \epsilon_2$$