Based on the explanation of the theory of external economy of land, this paper holds that land external economy is one of the important factors leading up to land increment, and tries to solve the problems of compensation and expropriation of land increment caused by land external economy through applying the theory of property rights differentiation and expropriating the Pigou tax.

External economy of land resources is a general designation of additional economy of land and overflowing economy of land, and it depends on the algebraic sum of the two numbers in quantity, which can be expressed by rights and prices of land income.

By analyzing the case of Hangzhou Qingchun Road financial street,the paper argues that financial cluster is the spontaneous behavior led by external economy and location advantage.

the development of medium and small - sized enterprises ran bring tremendous exterior economy (for example, employment and revenue), but neither security companies nor commercial hanks will take the benefit.

In the essence, it isthe exterior economy without production or commerce.

It concerns two questions: one is the outside economy, and the other is the outside non economy.

The solution of the problems of external economies in the development of tourism route is the urgent need of the wellordered progress of China s travel service industry.