Predicting returns over several decades
This chapter looks at expectations of returns several decades out. This is obviously a difficult task, as fundamental economic structures might change over such long periods. But we need multi-decade forecasts in certain situations. One conclusion of this chapter is that we must look beyond variables that predict turning points in the business cycle and stock-price multiples when dealing with the very long run. Over multiple decades, we will live through multiple business cycles. Variables that predict the next business cycle will not be particularly informative about the returns we expect over many decades. The chapter focuses on the deep underlying drivers of long-run returns, primarily expectations to long-run economic activity.The chapter also looks at expected long-run interest rates.