Nearest neighbor (NN) matching is widely used in observational studies for causal effects. Abadie and Imbens (2006) provided the first large‐sample analysis of NN matching. Their theory focuses on the case with the number of NNs, M fixed. We reveal something new out of their study and show that once allowing M to diverge with the sample size an intrinsic statistic in their analysis constitutes a consistent estimator of the density ratio with regard to covariates across the treated and control groups. Consequently, with a diverging M , the NN matching with Abadie and Imbens' (2011) bias correction yields a doubly robust estimator of the average treatment effect and is semiparametrically efficient if the density functions are sufficiently smooth and the outcome model is consistently estimated. It can thus be viewed as a precursor of the double machine learning estimators.

This paper investigates the effects of operational hedging on commodity price risks. It explores a novel type of operational hedging, i.e., the natural operational hedge position between upstream crude oil production and downstream activities in the supply chain. Using hand-collected data from 293 unique oil-producing firms, we find that operational hedging is sufficiently effective in reducing firms’ exposure to oil-price risk. We also find an inverse relationship between operational and financial hedging, suggesting that they can substitute for each other.

Abstract In the US, both taxes and old-age social security benefits depend on one’s marital status and tend to reduce the labour supply of the secondary earner. To what extent are these provisions holding back the female labour supply? We estimate a rich dynamic life-cycle model of labour supply and savings for couples and singles using the Method of Simulated Moments for the 1945 and 1955 birth cohorts. Our model matches well the life-cycle profiles of labour market participation, hours, and savings for married and single people, and generates plausible elasticities of labour supply. It implies that eliminating these marriage-related provisions would drastically increase the participation of married women over their entire life cycle, reduce the participation of married men after age 60, and increase savings. If the resulting government surplus were used to lower income taxation, there would be large welfare gains for the vast majority of the population. These results hold for both cohorts, including the later one, which has participation similar to that of more recent generations.

Abstract We study how firms build relations with local governments in emerging markets without established rules of political lobbying. We document that following a turnover of the Party Secretary or mayor of a city in China, firms (especially privately owned enterprises, POEs hereafter) headquartered in that city significantly increase their “perk spending,” for example, expenses for travel and entertainment among others. Both the instrumental-variable-based results and heterogeneity analysis are consistent with the interpretation that the perk spending is used to build relations with local governments. In addition, we find that local political turnover in a city tends to be followed by changes of the Chairmen or the CEOs of state-owned enterprises that are controlled by the local government. We also discuss and rule out several alternative explanations for the above findings.

This paper considers the problem of testing whether there exists a non‐negative solution to a possibly under‐determined system of linear equations with known coefficients. This hypothesis testing problem arises naturally in a number of settings, including random coefficient, treatment effect, and discrete choice models, as well as a class of linear programming problems. As a first contribution, we obtain a novel geometric characterization of the null hypothesis in terms of identified parameters satisfying an infinite set of inequality restrictions. Using this characterization, we devise a test that requires solving only linear programs for its implementation, and thus remains computationally feasible in the high‐dimensional applications that motivate our analysis. The asymptotic size of the proposed test is shown to equal at most the nominal level uniformly over a large class of distributions that permits the number of linear equations to grow with the sample size.

We find that minority shareholders’ voting opposition to dividend proposals is associated with significantly higher cash dividend payout in the following year for stocks listed in Shanghai Stock Exchange. When minority shareholders’ voting opposition increases, the likelihood and frequency of regulatory penalties increase. The reverse happens after firms increase dividend payout. Minority shareholders’ voting opposition has a stronger positive effect on cash dividend payout when they post more messages in stock forums and when independent directors express dissenting opinions. The effect is weaker if the board chair or CEO has political connections. Minority shareholders’ voting opposition does not have significant effects on the growth rate of earnings and the level of earnings management. But we do find evidence that minority shareholder voting opposition reduces expropriation by major shareholders. The evidence supports a hypothesis that regulators use the minority shareholder voting results to screen out possible cases of shareholder oppression.

This study examines whether the proportion of equity-based compensation in outside director compensation is associated with corporate strategic alliances. We hypothesize that equity incentives provided to outside directors mitigate potential agency conflicts between outside directors and shareholders that arise from the strategic alliance decision-making process, thus resulting in more alliance activities. Our empirical evidence indicates that the percentage of equity in outside director compensation is positively associated with the incidence and the number of strategic alliance activities. Additionally, when the proportion of outside directors' equity in total compensation is higher, firms with strategic alliances generate better future stock returns. Overall, our findings suggest that providing equity incentives in outside director compensation mitigates the agency problems inherent in corporate strategic alliance decisions and enhances the quality of alliance activities.

We examine whether having an internal labor market can help a firm affiliated with a privately owned business group (POBG) reduce labor cost stickiness. Our findings suggest that, when a POBG-affiliated firm experiences a decrease in sales, it has lower labor cost stickiness than an otherwise equivalent firm that is not affiliated with a POBG. Specifically, we find that, on average, a POBG-affiliated firm entirely mitigates labor cost stickiness when it has a decrease in sales. In addition, we document that, to adjust its labor cost downward, a POBG-affiliated firm hires fewer employees, rather than paying lower wages. We show that the lower labor cost stickiness is due to movement of employees from the focal firm to other firms within the same POBG. When sales fall, the POBG reallocates excess employees at the focal firm to other firms within the business group via an internal labor market, and the focal firm thereby increases its per capita profit. Moreover, we find that agency cost mediates the impact of a POBG on labor cost stickiness. When the external market is less effective or the POBG headquarters have strong incentives, the effect of POBG affiliation on the reduction in an affiliated firm's labor cost stickiness is more salient.

ABSTRACT The larger association between earnings and contemporaneous returns for negative returns than for positive returns is often attributed to conditional conservatism. We reason that this asymmetry may also be driven by the lack of timeliness with which stock price incorporates bad news relative to good news. Consistent with our reasoning, we show that when stock price incorporates bad news with delay, the asymmetry can exist in the absence of conditional conservatism. This suggests the testable hypothesis that the asymmetry decreases (increases) with factors that facilitate (impede) the incorporation of bad news into stock price. Using stock liquidity to test this hypothesis, we find that the earnings-return asymmetry decreases as stock liquidity increases. Our findings support the view that variation in the earnings-return asymmetry also reflects variation in the quality of the return generation process. Data Availability: Data are available from public sources cited in the text. JEL Classifications: G14; G40; M4; M40; M41.

Based on the Competing Values Framework (CVF), we score 10-K text to measure company culture in four types (collaborative, controlling, competitive, and creative) and examine its role in firm stability. We find that firms with higher controlling culture fared significantly better during the 2008–09 crisis. Firms with stronger controlling culture experienced fewer layoffs, less negative asset growth, greater debt issuance, and increased access to credit-line facilities during the crisis. The positive effect of the controlling culture is stronger among the financially-constrained firms. Overall, the controlling culture improves firm stability through greater support from capital providers.