Abstract: To measure the potential economic growth rate is of great use for setting and readjusting the macro-economic growth rate. In[1],the potential economic growth rate is represented by the reciprocal of the maximum eignvalue of characteristic equatiopn corresponding to the Dynamic Input-output matrix equation. In our paper,We have proved the stability of the maximum eignvalue and then set up a simple but useful model to compute the potential economic growth rate conveniently.

Key words: Dynamic Input-Output model, Potential economic growth rate