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We show that constraints can improve financial decision-making by disciplining behavioral biases. In financial markets, restrictions on leverage limit traders’ ability to borrow to open new positions. We demonstrate that regulation that restricts the provision of leverage to retail traders improves trading performance. By increasing the opportunity cost of postponing the realization of losses, leverage constraints improve traders’ market timing and reduce their disposition effect. We replicate these findings in two distinct experimental settings, further isolating the mechanism and demonstrating generality of the results. The interaction between constraints and behavioral biases has implications for policy and choice architecture.

We study the effect of personal wealth on entrepreneurial decisions using data on mineral payments from Texas shale drilling to individuals throughout the United States. Large cash windfalls increase business formation by 0.8 to 2.1 percentage points, but do not affect transitions to self-employment. By contrast, cash windfalls significantly extend self-employment spells, but do not affect the duration of business ownership. Our findings help reconcile contrasting findings in prior work: liquidity constraints have different effects on entrepreneurial activity that may depend on the entrepreneur’s motivations.

Early life exposure to local financial institutions increases household financial inclusion and leads to long-term improvements in consumer credit outcomes. We identify the effect of local financial markets using Congressional legislation that led to unintended differences in financial market development across Native American reservations. Individuals from financially underdeveloped reservations enter consumer credit markets later, and upon reaching adulthood, have ten point lower credit scores and four percentage point more delinquent accounts. These effects are long-lived and depreciate slowly after individuals move to more developed areas. Formative exposures to local banking improve consumer credit behavior by increasing financial literacy and financial trust.

Subjective mortality beliefs affect pre- and post-retirement consumption and savings decisions, as well as portfolio allocation. New survey evidence shows that individuals overestimate their mortality at short horizons and survival rate at long horizons. For example, a 28-year-old male with a 99.4% chance of surviving beyond 5 years believes he will do so with 92.8% probability. A 68 year old with a 71.4% probability of living to 78 believes he has an 82.4% chance of living that long. The formation of these beliefs across age cohorts can be attributed to overweighting salient causes-of-death. This bias matters empirically: Survival expectations correlate with heterogeneity in financial education and investment behavior. Embedded in a run-of-the-mill life-cycle model, these beliefs cause the young to under-save and retirees to not fully draw down their assets. In addition, for reasonable levels of risk-tolerance, the required excess rate of return on equity is in line with historical averages once subjective beliefs are accounted for.

Does the provision of leverage to retail traders improve market quality or facilitate socially inefficient speculation that enriches financial intermediaries? We evaluate the effects of 2010 regulations that cap leverage in the U.S. retail foreign exchange market. Using three unique data sets and a difference-in-differences approach, we document that the leverage-constraint reduces trading volume by 23%, alleviates high-leverage traders’ losses by 40%, and reduces brokerages’ operating capital by 25%. Yet, the policy does not affect the relative bid-ask prices charged by the brokerages. These results suggest the policy improves belief-neutral social welfare without reducing market liquidity.

Social interaction contributes to some traders' disposition effect. New data from an investment-specific social network linked to individual-level trading records builds evidence of this connection. To credibly estimate causal peer effects, I exploit the staggered entry of retail brokerages into partnerships with the social trading web platform and compare trader activity before and after exposure to these new social conditions. Access to the social network nearly doubles the magnitude of a trader's disposition effect. Traders connected in the network develop correlated levels of the disposition effect, a finding that can be replicated using workhorse data from a large discount brokerage.

This paper provides novel evidence on the real and financial market effects of legal institutions. Our analysis exploits persistent and externally imposed differences in court enforcement that arose when the U.S. Congress assigned state courts to adjudicate contracts on a subset of Native American reservations. Using area-specific data on small business lending, we find that reservations assigned to state courts, which enforce contracts more predictably than tribal courts, have stronger credit markets. Moreover, the law-driven component of credit market development is associated with significantly higher per capita income, with stronger effects in sectors that depend more on external financing.Received April 24, 2015; accepted March 7, 2016 by Editor Robin Greenwood.

Powerful politicians can interfere with the enforcement of regulations. As such, expected political interference can affect constituents’ behavior. Using rotations of Senate committee chairs to identify variation in political power and expected regulatory relief, we study powerful politicians’ effect on consumer lending to communities protected by fair-lending regulations. We find a 7.5% reduction in credit access to minority neighborhoods in states with new committee chairs. Larger reductions occur in Community Reinvestment Act-eligible neighborhoods and when Senators serve on committees that oversee the enforcement of fair-lending laws. Banks headquartered in powerful Senators’ states are responsible for the reduction in credit access.

The authors show that court enforcement uncertainty hinders economic development using sharp variation in judiciaries across Native American reservations in the United States. Congressional legislation passed in 1953 assigned state courts the authority to resolve civil disputes on a subset of reservations, while tribal courts retained authority on unaffected reservations. Although affected and unaffected reservations had similar economic conditions when the law passed, reservations under state courts experienced significantly greater long-run growth. When the authors examine the distribution of incomes across reservations, the average difference in development is due to the lower incomes of the most impoverished reservations with tribal courts. The authors show that the relative underdevelopment of reservations with tribal courts is driven by reservations with the most uncertainty in court enforcement.