A popular interpretation of the Rational Expectations/Efficient Markets hypothesis states that, if it holds, market valuations must follow a random walk; hence, the hypothesis is frequently criticized on the basis of empirical evidence against such a prediction. Yet this reasoning incurs what we...

We empirically evaluate a behavioural model with boundedly rational traders who disagree about the persistence of deviations from the fundamental stock price. Fundamentalist traders believe in mean-reversion, while chartists extrapolate trends. Agents gradually switch between the two rules,...

In a tractable stochastic volatility model, we identify the price of the smile as the price of the unspanned risks traded in SPX option markets. The price of the smile reflects two persistent volatility and skewness risks, which imply a downward sloping term structure of low-frequency variance...

What role does labor play in firms? market value? We explore this question using a production-based asset pricing model with frictions in the adjustment of both capital and labor. We posit that hiring of labor is akin to investment in capital and that the two interact, with the interaction being...

A popular interpretation of the Rational Expectations/Efficient Markets hypothesis states that, if the hypothesis holds, then market valuations must follow a random walk. This postulate has frequently been criticized on the basis of empirical evidence. Yet the assertion itself incurs what we...

A popular interpretation of the Rational Expectations/Efficient Markets hypothesis states that, if the hypothesis holds, then market valuations must follow a random walk. This postulate has frequently been criticized on the basis of empirical evidence. Yet the assertion itself incurs what we...

We explore the relationship between sticky wages and risk. Like operating leverage, sticky wages are a source of risk for the firm. Firms, industries, regions, or times with especially high or rigid wages are especially risky. If wages are sticky, then wage growth should negatively forecast...

We study the impact of labor market frictions on asset prices. In the cross section of U.S. firms, a 10 percentage points increase in the firm's hiring rate is associated with a 1.5 percentage points decrease in the firm's annual risk premium. We propose an investment-based model with stochastic...

This paper provides new evidence about the link between firm level total factor productivity (TFP) and stock returns. We estimate firm level TFP and show that it is strongly related to several firm characteristics such as size, the book to market ratio, investment, and hiring rate. Low...

Medical innovation enhances labor health, promotes human capital productivity, and influences asset prices. Using a manually collected dataset on drug approvals to identify medical innovation, I first confirm its direct impact on human capital -- a higher medical innovation shock predicts a...