求翻译：政府在证券市场中的作用长期以来，证券市场政府监管就受到经济学家和金融界人士的肯定，但是也 有不少经济学家提出疑义，认为政府监管只会抑制资本市场发展、增加成本、带 来负外部性。是什么意思？

Government's role in the stock market a long time, the stock market by economists and government regulation on the recognition of the financial community, but many economists doubt that government regulation would inhibit the development of capital markets, increased costs, with to negative external

The role of the Government in the securities market, the securities market regulation by the Government has long been recognized by economists and bankers, but also a lot of economists expressed doubts about the Government in monitoring, that will only discourage capital market development, increase

Government's in stock market function since long ago, stock market government supervising and managing receives the economist and the financial circles public figure's affirmation, but also has many economists to propose the doubt, thought government supervising and managing only can suppress the ca

Role of Government in the stock market for a long time, by economists, the Government regulation of securities market and financial sector certainly, but it had made many economists doubt that government regulation will only suppress the development of capital markets, increased costs, a negative ex