Welch and Goyal (2008) find that numerous economic variables with in-sample predictive ability for the equity premium fail to deliver consistent out-of-sample forecasting gains relative to the historical average. Arguing that model uncertainty and instability seriously impair the forecasting...

This article investigates the long-run relationship between prices and wage-adjusted productivity as well as between real wages and average labor productivity at the industry level for a panel of 459 U.S. manufacturing industries over the period 1956–1996. Panel cointegration test results...