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What do outside CEOs really do? Evidence from plant-level data

Journal of Financial Economics 2023 147(1), 27-48
Using rich plant-level data, we analyze the relative performance of firms with inside and outside CEOs. We show that firms with outside CEOs achieve greater productivity improvements compared to firms with inside CEOs. Contrary to conventional wisdom, the relation is stronger in well-performing, rather than poorly performing, firms. Although part of the productivity growth differential comes from divesting low-performing, peripheral, low-tech, and unionized plants, most productivity improvements arise from streamlining continuing plants. Here, productivity is increased by consolidating products, changing the composition of investments toward newer capital, shifting to more capital-intensive production, adopting structured management practices, and improving labor productivity.

Thematic Concentration and Mutual Fund Performance

Review of Financial Studies 2026
This study examines whether mutual fund managers generate alpha through thematic investment strategies that select stocks poised to benefit from specific themes. Using textual analysis of 10-K filings, we identify stocks’ thematic exposures and construct each fund’s thematic concentration index (TCI) from its holdings. High-TCI funds significantly outperform, with a top-minus-bottom decile spread of 4.26% in annualized four-factor alpha. Managers’ thematic expertise is related to their undergraduate field of study. Outperformance arises from superior stock selection rather than theme-related timing, with an informational advantage on firm earnings, particularly in stocks exposed to themes related to managers’ undergraduate training.

The effect of labor mobility on corporate investment and performance over the business cycle

Journal of Banking & Finance 2024 166, 107258
We show that time-series variation in investment opportunities and labor demand create heterogeneity in the effects of labor mobility on corporate investment over the business cycle. To isolate variation in labor mobility, we create an annual state-level index from 1984 through 2017 that captures the degree to which state courts enforce covenants not to compete. We find that firms located in more mobile labor markets increase investment rates more during economic expansions but have similar investment rates during periods of low or negative growth. This increased investment during expansions is greater for firms that rely more on recruiting skilled and experienced workers to grow their businesses, and it translates into higher sales growth rates, profits, and valuations. Overall, our results suggest that the benefits of being able to recruit qualified workers with relevant experience during expansions outweigh the costs associated with losing key workers.

Employment Protection, Investment, and Firm Growth

Review of Financial Studies 2020 33(2), 644-688
We exploit the adoption of U.S. state-level labor protection laws to study the effect of employment protection on corporate investment rates and sales growth. We find that, following the adoption of these laws, capital expenditures as a percentage of book assets decrease, resulting in slower sales growth. Our findings are consistent with theories predicting that greater employment protection discourages investment by making projects more irreversible. Supporting this channel, following negative cash flow shocks, firms are less likely to downsize operations in states that have adopted these laws but more likely to downsize in states that have not adopted these laws.

The Impact of Bank Credit on Labor Reallocation and Aggregate Industry Productivity

Journal of Finance 2018 73(6), 2787-2836
We provide evidence that the deregulation of U.S. state banking markets leads to a significant increase in the relative employment and capital growth of local firms with higher productivity, and that this effect is concentrated among young firms. Using financial data for a broad range of firms, our analysis suggests that this effect is driven by a shift in the composition of local bank credit supply toward more productive firms. We estimate that this effect translates into economically important gains in aggregate industry productivity and that changes in the allocation of labor play a central role in driving these gains.