Why has business investment fallen below its pre-crisis trend?
Core argument: Business investment in OECD economies, the bulk of total investment, fell after 2008 and in 2021 declined by about 40% of its pre-global-financial-crisis trend.
In OECD economies, business investment—the bulk of total investment—tumbled after 2008, and in 2021 it fell by about 40% of its pre-global-financial-crisis trend. For every 1pp decline in output growth that is not triggered by a contraction in business investment, there is a corresponding 2pp decrease in investment growth. This estimated output-investment relationship is used to calculate the investment shortfall from the growth slowdown following the global financial crisis. Comparing with the precrisis trend, Figure 3.8 suggests that as of 2021, about half of the shortfall in business investment since 2008 can be linked to weaker economic activity. [In a separate firm-level analysis of investments by public companies,] since 2008, Tobin’s q, an indicator of firms’ future productivity and profitability expectations, has decreased by 10 to 30% on average, contributing to the bulk of the explained decline in investment in both advanced and emerging market economies.

