Is it possible to get a Leontief inverse matrix $(I-C)^{-1}=I+C+C^2+....$ not equal to $I$ when the leading eigenvalue of matrix $C$, meaning the maximum of absolute eigenvalues, is zero?
I am doing an empirical research and this keeps happening in the code, which I am pretty skeptical about. The $C$ in my case is the partial correlation matrix of some time series.