What is Tobin's Q theory?
My concept of 'Tobin's Q' is a measure of the ratio of the market value of a firm to the replacement cost of its assets. I posited that when Q is high, meaning the market values the firm more than it would cost to replace its assets, firms have an incentive to invest in new capital. Conversely, when Q is low, investment is discouraged. This theory highlights how financial valuations can directly influence real investment decisions and, consequently, aggregate economic growth.
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