From the Abstract of J.W. Mason’s “Disgorge the Cash:  The Disconnect Between Corporate Borrowing and Investment”:

This paper provides evidence that the strong empirical relationship of corporate cash flow and borrowing to productive corporate investment has disappeared in the last 30 years and has been replaced with corporate funds and shareholder payouts. Whereas firms once borrowed to invest and improve their long-term performance, they now borrow to enrich their investors in the short-run. This is the result of legal, managerial, and structural changes that resulted from the shareholder revolution of the 1980s. Under the older, managerial, model, more money coming into a firm – from sales or from borrowing – typically meant more money spent on fixed investment. In the new rentier-dominated model, more money coming in means more money flowing out to shareholders in the form of dividends and stock buybacks.