Influenced by classical economics, “price mechanism” is often considered as the unique efficient vehicle of driving the free markets; therefore, there is no any position for the government’s role in an Arrow-Debreu’s economy. However, multiple equilibria will result in a “free zone”, which is not controlled by “price mechanism”. Within the framework of an Arrow-Debreu’s economy, we present a
... [Show full abstract] model to show that the “free zone” will be controlled by two parameters, which are marginal labor-capital return and marginal technology return, respectively. In particular, the marginal labor-capital return can be identified with an index of measuring the deviation of real economies from general equilibria. Because the real economies almost always deviate from ideal equilibria, the government will have to play an important role of eliminating the deviation. This finding may shed light on solving economic development dilemma in today’s world. Remarkably, our model is strongly supported by the empirical data from the OECD countries.