Published Papers

We propose that stock-market participation is influenced by social interaction. In our model, any given "social" investor finds the market more attractive when more of his peers participate. We test this theory using data from the Health and Retirement Study, and find that social households - those who interact with their neighbors, or attend church - are substantially more likely to invest in the market than non-social households, controlling for wealth, race, education, and risk tolerance. Moreover, consistent with a peer-effects story, the impact of sociability is stronger in states where stock-market participation rates are higher.

This study investigates whether geographic variation in religion-induced gambling norms affects aggregate market outcomes. We conjecture that gambling propensity would be stronger in regions with higher concentrations of Catholics relative to Protestants. Consistent with our conjecture, we show that in regions with higher Catholic-Protestant ratios, investors exhibit a stronger propensity to hold lottery-type stocks, broad-based employee stock option plans are more popular, the initial day return following an initial public offering is higher, and the magnitude of the negative lottery-stock premium is larger. Collectively, these results indicate that religion-induced gambling attitudes impact investors' portfolio choices, corporate decisions, and stock returns.

Experimental economics represents a strong growth industry. In the past several decades the method has expanded beyond intellectual curiosity, now meriting consideration alongside the other more traditional empirical approaches used in economics. Accompanying this growth is an influx of new experimenters who are in need of straightforward direction to make their designs more powerful. This study provides several simple rules of thumb that researchers can apply to improve the efficiency of their experimental designs. We buttress these points by including empirical examples from the literature.

The majority of lower socioeconomic status (SES) households in the U.S. and Europe do not have stock investments, which is detrimental to wealth accumulation. Here, we examine one explanation for this puzzling fact, namely, that economic adversity may influence how people learn from financial information. Using experimental and survey data from the U.S. and Romania, we find that lower SES individuals form more pessimistic beliefs about the distribution of stock returns and are less likely to invest in stocks when these investments are likely to have good outcomes. SES-related differences in pessimism may help explain variation in investments across households.

Are differences in local banking development long lasting? Do they affect economic performance? I answer these questions by relying on a historical development that occurred in Italian cities during the Renaissance. A change in Catholic doctrine led to the development of modern banks in cities hosting Jewish communities. Using Jewish demography in 1500 as an instrument, I provide evidence of extraordinary persistence in the level of banking development across Italian cities and substantial effects of local banks on per capita income. Additional firm-level analyses suggest that banks exert large effects on aggregate productivity by reallocating resources toward more efficient firms.

We examine the formation and evolution of corporate risk culture, that is, the preferences toward risk and uncertainty shared by a firm's leaders, as well as its effect on corporate policies. We document persistent commonality in risk attitudes inside firms, which arises through the selection of leaders with similar preferences and is rooted in the founders' risk attitudes. Changes in corporate risk culture over time affect corporate investment policies, whereas cross-sectional differences in founders' risk attitudes, that is, firms' initial risk culture, contribute to differences across firms in persistent firm policies, such as research and development intensity.

We examine how individualism, a cultural attribute that emphasizes autonomy, ability, and self-belief, affects hedge funds (HFs). Using Hofstede's framework, we show HFs located in individualistic (IDV) cultures structure their contracts with more performance-driven incentives, take greater risk, and herd less. Individualism also influences risk-shifting behavior: after initial underperformance, HFs increase risk-taking in high IDV cultures. Yet, HFs do not outperform in individualistic countries and draw lower Sharpe ratios, which highlights the link between individualism and overconfidence/over-optimism. Interestingly, HFs' survival is less sensitive to performance in individualistic cultures, again consistent with greater autonomy and opportunities in these countries.

Using a cross-country sample, we examine the chief executive officer (CEO) tournament structure (measured alternatively as the ratio and the difference of pay between the CEO and other top executives within a firm). We find the tournament structure to vary systematically with firm and country cultural characteristics. In particular, firm size and the cultural values of power distance, fair income differences, and competition are significantly associated with variations in tournament structures. We also establish support for the primary implication of tournament theory in that tournament structure tends to be positively related to firm value, even after controlling for endogeneity.

We find that firms headquartered in U.S. counties with higher levels of social capital incur lower bank loan spreads. This finding is robust to using organ donation as an alternative social capital measure and incremental to the effects of religiosity, corporate social responsibility, and tax avoidance. We identify the causal relation using companies with a social-capital-changing headquarters relocation. We also find that high-social-capital firms face loosened nonprice loan terms, incur lower at-issue bond spreads, and prefer public bonds over bank loans. We conclude that debt holders perceive social capital as providing environmental pressure that constrains opportunistic firm behaviors in debt contracting.

Investment managers are subject to personal and institutional norms that can constrain their investment choices. We conjecture that norm-constrained investors deviate from such norms only when they have compelling information, and we predict that deviating investments earn relatively high abnormal returns ex post. Consistent with our conjecture, we find that institutions averse to holding lottery-like stocks or sin stocks earn relatively high abnormal returns when they choose to hold such stocks. We find similar but weaker results for deviations from broader style categories. Overall, our evidence indicates that deviations from established institutional or social norms signal informed investing.

We present evidence suggesting that chief executive officer (CEO) connections facilitate investments in corporate innovation. We find that firms with better-connected CEOs invest more in research and development and receive more and higher quality patents. Further tests suggest that this effect stems from two characteristics of personal networks that alleviate CEO risk aversion in investment decisions. First, personal connections increase the CEO's access to relevant network information, which encourages innovation by helping to identify, evaluate, and exploit innovative ideas. Second, personal connections provide the CEO with labor market insurance that facilitates investments in risky innovation by mitigating the career concerns inherent in such investments.

The thoughts and behaviors of financial market participants depend upon adopted cultural traits, including information signals, beliefs, strategies, and folk economic models. Financial traits compete to survive in the human population and are modified in the process of being transmitted from one agent to another. These cultural evolutionary processes shape market outcomes, which in turn feed back into the success of competing traits. This evolutionary system is studied in an emerging paradigm, social finance. In this paradigm, social transmission biases determine the evolution of financial traits in the investor population. It considers an enriched set of cultural traits, both selection on traits and mutation pressure, and market equilibrium at different frequencies. Other key ingredients of the paradigm include psychological bias, social network structure, information asymmetries, and institutional environment.