| Summary: | A survey of the literature on asset price impacts on the real economy shows a much wider range of work on consumption and related wealth effects than on investment. The existence of wealth effects on consumption per se is little contested, but there remains an issue of whether different effects should hold between countries and across assets. On balance we contend that the literature suggests a role for housing and tangible wealth as well as financial wealth as a determination of consumption. In terms of investment there are numerous studies implying that uncertainty and balance sheet effects on investment can both be detected, albeit the latter more in micro than macro studies. In the light of the investment literature, we undertook panel investment functions on a macro basis for up to 23 OECD countries. Developing earlier work, it was found that the main significant effects arising from asset prices come from the financial accelerator, credit channel and Tobin's Q (especially in the G7) and uncertainty as proxied by asset price volatility (especially in smaller OECD countries). There is also evidence for non-linearities in volatility. Descriptive analysis as well as tentative cross-sectional regression showed that both balance sheet and uncertainty channels played a role in the recent financial crisis, when investment fell sharply, although the simple accelerator was also important. The work has implications for monetary, fiscal and regulatory policies, all of which can impact on asset prices and the financial sector and thus via this channel on the wider economy
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