Silber mainly discusses financial innovation from the perspective of supply. He believes that financial repression comes from two aspects: first, government control and management. The second is internal repression.

2. Kane's theory of evading financial innovation.

Kane put forward the financial innovation theory of "evasion". The theory of "evasion" attaches great importance to the influence of external environment on financial innovation.

3. Hicks and Niehans's innovative theory of transaction cost.

The basic proposition of financial innovation theory put forward by Hicks and Niehans is that "the leading factor of financial innovation is to reduce transaction costs". This proposition contains two meanings: reducing transaction cost is the primary motivation of financial innovation, and the level of transaction cost determines whether financial business and financial instruments have practical significance; Financial innovation is essentially a response to the reduction of transaction costs caused by scientific and technological progress.

4. Financial deepening theory.

Edward Shaw, an American economist, made a pioneering study on the relationship between finance and economic development from the perspective of development economics. He put forward the theory of financial deepening, demanding financial deregulation and financial liberalization. This is in line with the requirements of financial innovation, so it has become an important theoretical basis for promoting financial innovation.