High growth rate of labor hours per worker signals low future stock returns and high future hiring rate. As labor hours are substituted for hiring, hiring becomes less responsive to future discount rate. The growth rate of the number of labor hours per worker does not appear to be related to future profitability. Our findings are largely consistent with a dynamic labor hours asset pricing model that features large asymmetric costs in adjusting the number of workers and small costs in adjusting the number of hours per worker.

We examine the investor sentiment and limits-to-arbitrage explanations for the positive cross-sectional relation between cash holdings and future stock returns. Consistent with the investor sentiment hypothesis, we find that the cash holding effect is significant when sentiment is low, and it is insignificant when sentiment is high. In addition, the cash holding effect is strong among stocks with high transaction costs, high short selling costs, and large idiosyncratic volatility, indicating that arbitrage on the cash holding effect is costly and risky. In line with the limits-to-arbitrage hypothesis, high costs and risk prevent rational investors from exploiting the cash holding effect.