"investment function" is correct and usable in written English.
You can use it to refer to the action of investing. For example, "Before making an investment decision, it is important to consider the potential returns from the investment function."
In other words, the state should always have an investment function.
Since the private sector is unwilling to invest, some mechanisms must be found where the public sector can temporarily take over that investment function.
The "hydraulic Keynesianism" of the 1950s was all about viewing the economy as a kind of mechanism in which consumer behavior could be represented by an ad hoc consumption function, investment behavior by an ad hoc investment function, and so on.
We derive the investment function, bank lending function, and so on.
Levinsohn and Petrin (2003) argued that the strict monotonicity of the investment function was broken given the many zeros reported by firms.
It should be noted that housing expenditures can be categorized into either survival-oriented consumption or development-oriented consumption in terms of its investment function.
The signatories of the Observer letter are concerned that Vickers won't go far enough, arguing that only complete separation of retail and investment functions can insulate the taxpayer from further bank failures.
An optimal solution procedure is developed by incorporating two types of investment functions such as (i) Linear case and (ii) Logarithmic case to reduce the ordering cost reduction in each mathematical model.
Nonetheless, a common feature of regulatory initiatives designed to secure a more structurally independent risk management function is that they have failed to rectify a critical imbalance of power - with the back office control functions continuing to be dominated by front office trading and investment functions.
Unlike Mr. Chlapowski, however, he will separate the chief executive role from the chief investment officer function.
And a huge amount of overhead had been put in place by Wall Street to deal with a rapidly expanding market, not just in the investment banking function, but also in the research staffing.
