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The Effect of Police Response Time on Crime Clearance Rates

Review of Economic Studies 2018 85(2), 855-891 open access
Police agencies devote vast resources to minimizing the time that it takes them to attend the scene of a crime. Despite this, the long-standing consensus is that police response time has no meaningful effect on the likelihood of catching offenders. We revisit this question using a uniquely rich dataset from the Greater Manchester Police. To identify causal effects, we use a novel strategy that exploits discontinuities in distance to the response station across locations next to each other, but on different sides of division boundaries. Contrary to previous evidence, we find large and strongly significant effects: in our preferred estimate, a 10% increase in response time leads to a 4.7 percentage points decrease in the likelihood of clearing the crime. We find stronger effects for thefts than for violent offences, although the effects are large for every type of crime. We find suggestive evidence in support of two mechanisms: the likelihood of an immediate arrest and the likelihood that a suspect will be named by a victim or witness both increase as response time becomes faster. We argue that, under conservative assumptions, hiring an additional response officer would generate a benefit, in terms of future crime prevented, equivalent to 170% of her payroll cost.

Face-to-Face Communication in Organizations

Review of Economic Studies 2021 88(2), 574-609 open access
Communication is integral to organizations and yet field evidence on the relation between communication and worker productivity remains scarce. We argue that a core role of communication is to transmit information that helps co-workers do their job better. We build a simple model in which workers choose the amount of communication by trading off this benefit against the time cost incurred by the sender, and use it to derive a set of empirical predictions. We then exploit a natural experiment in an organization where problems arrive and must be sequentially dealt with by two workers. For exogenous reasons, the first worker can sometimes communicate face-to-face with their colleague. Consistently with the predictions of our model, we find that: (1) the second worker works faster (at the cost of the first worker having less time to deal with incoming problems) when face-to-face communication is possible, (2) this effect is stronger when the second worker is busier and for homogenous and closely located teams, and (3) the (career) incentives of workers determine how much they communicate with their colleagues. We also find that workers partially internalise social outcomes in their communication decisions. Our findings illustrate how workers in teams adjust the amount of mutual communication to its costs and benefits.

Women on Boards in Finance and STEM Industries

American Economic Review 2016 106(5), 277-281 open access
We document that women are less represented on corporate boards in Finance and more traditional STEM industry sectors. Even after controlling for differences in firm and country characteristics, average diversity in these sectors is 24% lower than the mean. Our findings suggest that well-documented gender differences in STEM university enrolments and occupations have long-term consequences for female business leadership. The leadership gap in Finance and STEM may be difficult to eliminate using blanket boardroom diversity policies. Diversity policies are also likely to have a different impact on firms in these sectors than in non-STEM sectors.

Management insulation and bank failures

Journal of Financial Intermediation 2021 47, 100909 open access
How does management insulation from shareholder pressure influence banks’ resilience to crises? To address this question, we develop a measure of management insulation based on legal provisions. Unlike the existing alternatives, our measure considers the interactions between different provisions. We use this measure to study the relationship between management insulation and bank failure during the 2007–09 financial crisis. We find that banks in which managers were more insulated from shareholders in 2003 were less likely to be both bailed out in 2008/09 and targeted by activist shareholders. By contrast, alternative measures of management insulation fail to predict both bailouts and shareholder activism.

Boards of Banks

Journal of Corporate Finance 2025 94, 102839 open access
Bank board directors are highly independent but possess limited prior banking experience. Using a sample of banks from 90 countries between 2000 and 2020, we find that country-specific characteristics explain most of the cross-sectional variation in bank board independence. In contrast, country characteristics have little explanatory power for boards’ banking experience. While we document evidence of international convergence in bank board independence, U.S. banks lag behind their global counterparts in director banking experience. The data suggest that country-specific laws and regulations primarily shape bank board composition through requirements for director independence.