另外,一个模型本来已经运行出来了,但像考虑控制变量如性别,是不是直接加入虚拟变量?
我这样做后,程序运行不出来了,显示: W_A_R_N_I_N_G: PHI is not positive definite
W_A_R_N_I_N_G: PSI is not positive definite
W_A_R_N_I_N_G: The solution was found non-admissible after 50 iterations.
The following solution is preliminary and is provided only
for the purpose of tracing the source of the problem.
Setting AD> 50 or AD=OFF may solve the problem
该怎么办?高手请指教