Knowledge that Transforms

We construct a time series of news coverage about air pollution in China for the period 1977–2019. Our measure of abnormal news coverage (ANC) of China’s air pollution is uncorrelated with growth in economic activity or cyclical components of such activity, but strongly correlated with weather-related and atmospheric conditions known to cause air pollution. ANC is associated with more capital flight from China. Focusing on the USA as a destination country, we find that ANC is associated with more Chinese citizens emigrating to US regions with stronger ethnic links to China, and more international students enrolling in US institutions with stronger Chinese student links. US regions with stronger ethnic or educational ties to China experience higher property price growth when ANC is higher. Our study suggests that perception of local environmental risk can have major consequences for the cross-border reallocation of capital and labor.

We investigate the puzzle of widespread participation in cryptocurrency pump-and-dump manipulation schemes. Unlike stock market manipulators, cryptocurrency manipulators openly declare their intentions to pump specific coins, rather than trying to deceive investors. Puzzlingly, people join in despite negative expected returns. In a simple framework, we demonstrate how overconfidence and gambling preferences can explain participation in these schemes. Analyzing a sample of 355 cases in 6 months, we find strong empirical support for both mechanisms. Pumps generate extreme price distortions of 65% on average, abnormal trading volumes in the millions of dollars, and large wealth transfers between participants.

Short sellers care about (i) how overvalued an asset is and (ii) when the overvaluation will be corrected. Hence, short selling costs should be higher over horizons when negative information is more likely to arrive. This article presents a model formalizing this intuition and tests the model using the put–call parity condition. Forward shorting costs predict future costs and stock returns, consistent with an expectations hypothesis in the shorting market. Additionally, an upward sloping term structure around earnings announcements increases the probability of a negative earnings surprise, evidence that short selling costs are higher over horizons when negative information is more likely to arrive. My findings suggest that the term structure of short selling costs conveys how long overpricings are expected to persist.

We study how risks spill over from shadow banking activities to traditional banks through implicit guarantees. Using data on wealth management products (WMPs), China’s largest shadow banking component, we find that banks with higher interbank borrowing rates strategically provide stronger implicit guarantees to their issued WMPs. Extending implicit guarantees builds bank reputations and reduces rollover costs while exposing banks to losses from shadow banking activities. Our findings thus suggest a bank-specific approach to assessing the risk of implicit guarantees based on transparent and real-time interbank rates.

From 2007 to 2020, unlisted Chinese firms paid an average of over US $500 million to listed firms for their shell value in reverse merger transactions. We show that this large shadow price for a public listing sheds light on other features of Chinese markets, including (i) near-zero mortality rates, (ii) frequent major-asset restructurings (MARs), (iii) insensitivity of small-firm prices to corporate earnings, and (iv) a large size effect. A firm-level measure of expected shell probability (ESP) predicts stock returns, MARs, earnings-to-price sensitivity, and short-window returns to initial public offering-related regulatory news. Furthermore, adding ESP to existing pricing models for Chinese stocks significantly improves model performance.

This article investigates how transportation networks shape firms’ geographic footprint by reducing monitoring costs of distant investments. Exploiting the staggered expansions of China’s passenger high-speed rail (HSR) network, we document that the amount of intercity investment between a pair of cities increases by 45% with the introduction of an HSR line connecting the cities. We enhance the causal inference by applying high-dimensional fixed effects, and focusing on city pairs that are “accidentally” connected in the network. The HSR effect is the strongest in industries that require on-site monitoring, as well as for controlling stakes in large distant investments.

We construct recursive solutions for, and study the properties of the dynamic equilibrium of an economy with three types of agents: (i) household/investors who supply labor with a finite elasticity, consume a large variety of goods that are not perfect substitutes and trade government bonds; (ii) firms that produce those varieties of goods, receive productivity shocks and set prices in a Calvo manner; (iii) a government that collects an income-driven fiscal surplus and acts mechanically, buying and selling bonds in accordance with a Taylor policy rule based on expected inflation. In this setting, we show that stock market returns are much less than one-for-one related to inflation over a 1-year holding period, which means that stock securities have a strong nominal character. We also show that their nominal character diminishes as the length of the stock-holding period increases, in accordance with empirical evidence.

At long horizons, multiplicative compounding induces strong-to-extreme positive skewness into stock returns; the magnitude of the effect is primarily determined by single-period volatility. Consequently, at horizons greater than 5 years, returns—individual or portfolio—will be positively skewed under reasonable parameterizations. From an investor perspective, the strong positive skewness implies that the mean compound return will serve as a poor guide for typical long-horizon outcomes. Moreover, the large effects of compounding on higher-order moments are shown to affect the validity of Taylor expansions used to approximate preferences for skewness, when applied to returns of annual or longer horizons.

We find that heightened cross-border bank flows are associated with lower systemic risk in a target country’s banking system. The reductions in systemic risk are stronger for flows coming from source countries with stronger regulatory oversight than the target country. Such cross-border bank flows linked to regulatory arbitrage are also associated with improvements in target banking sector profitability, asset quality, and efficiency. We assess several alternative channels of influence for cross-border bank flows but interpret the evidence on these flows as mostly consistent with a benign form of regulatory arbitrage.

Using micro-level data, we examine the behavior of socially responsible investment (SRI) funds. SRI funds select firms with lower pollution, more board diversity, higher employee satisfaction, and better workplace safety. Yet, both in the cross-section and using an exogenous shock to SRI capital, we find that SRI funds do not significantly change firm behavior. Moreover, we find little evidence that they try to impact firm behavior using shareholder proposals. Our results suggest that SRI funds are not greenwashing, but they are impact washing; they invest in a portfolio of firms with better environmental and social conduct but do not follow through on their promise of impact.