Which covariates should be controlled in propensity score matching? Evidence from a simulation study

Propensity score matching is a widely‐used method to measure the effect of a treatment in social as well as medicine sciences. An important issue in propensity score matching is how to select conditioning variables in estimation of the propensity scores. It is commonly mentioned that variables which affect both program participation and outcomes are selected. Using Monte Carlo simulation, this paper shows that efficiency in estimation of the Average Treatment Effect on the Treated can be gained if all the available observed variables in the outcome equation are included in the estimation of propensity scores. This result still holds in the presence of non‐sampling errors in the observed control variables.     

Characterization of Normal Distribution Related to Two Samples Based on Regression

Characterization of normal distribution related to two samples based on second conditional moments has been obtained. This characterization has been transformed to a characterization based on the UMVU estimators of the density function. These results are generalized to k samples from normal distributions. Finally applications of these characterization results to goodness-of-fit test are discussed.     

What determines outstanding corporate debt mix? Evidence from fractional multinomial logit estimation

This study employs the fractional multinomial logit setting proposed by Papke and Wooldridge (1996) to examine factors driving the choice among nonbank private (144A) debt, bank loans and public debt made by 988 nonfinancial firms during 1993–2007. We document that the majority of firm-level factors have persistent effects on corporate outstanding debt mix across economic conditions. We also highlight the importance of macroeconomic variables on firms’ borrowing decisions as predicted by Diamond (1991). Finally, we document a substitution effect among debt financing sources due to credit rating downgrades, which is inconsistent with Rauh and Sufi (2010).     

An Evaluation of Inertia Models of Unemployment

Two approaches have been used to model unemployment. The first, conventional, approach involves linking the unemployment outcome to observed indices of productivity, structural factors and discrimination such as educational attainment, location and birthplace. The second approach, the inertia model, involves using a person's labour market history as a way of including in unemployment models information on the 'unobservables' that influence employability. This paper evaluates the performance of both models of unemployment. The results provide unambiguous support for the inertia model when modelling unemployment. The inertia model has higher explanatory power, higher within-sample prediction rate success and fewer out-of-sample forecasting errors than the conventional model. The estimates from the inertia model can be used to provide quite accurate predictions of the risk of becoming unemployed. This is important if individuals at high risk of becoming unemployed are to be targeted for labour market assistance.     

Environmental proactivity,competitive strategy,and market performance: The mediating role of environmental reputation

This article examines the impact of small and medium-sized enterprises' (SMEs) proactive environmental strategy on market performance through the mediating mechanism of environmental reputation. In addition, we investigate the potential moderating role of competitive strategies on the environmental reputation-market performance nexus. Data were collected from 223 SMEs. Using the hierarchical multiple regression analysis, the results show that a proactive environmental strategy positively enhances environmental reputation. Also, the influence of proactively environmental strategy on market performance is mediated by environmental reputation. In addition, our findings show the relationship between environmental reputation and market performance is greater for firms that adopt the differentiation strategy but not significant for firms adopting the low-cost and integrated strategies. Our study offers several theoretical and practical implications.     

Environmental performance,sustainability, governance and financial performance: Evidence from heavily polluting industries in China

This study seeks to contribute to the existing business strategy and the environment literature by examining the effect of governance structures on Chinese firms' environmental performance, and consequently ascertain the extent to which the financial performance–environmental performance nexus is moderated by governance mechanisms. Using a sample of Chinese companies from heavily polluting industries over a 5-year period, our baseline findings suggest that, on average, board size and governing board meetings are positively associated with Chinese firms' environmental performance, whilst board independence and gender diversity have positive, but insignificant association with firms' environmental performance. Our evidence suggests further that the examined internal governance mechanisms have a mixed moderating effect on the link between financial performance and environmental performance. Our findings have important implications for company executives, environmental activists, policy-makers, and regulators. Our results support insights drawn from agency, resource dependence, stakeholder, and legitimacy theories.     

Sexual Identity,Same‐Sex Relationships,and Labour Market Dynamics: New Evidence from Longitudinal Data in Australia

Using newly collected data on sexual identity from the Household, Income and Labour Dynamics in Australia Survey, this study examines the relationship between sexual identity and labour market outcomes. Our findings show that gay males are: (i) less likely to be continuously employed than their heterosexual counterparts, and (ii) face an annual earnings penalty of 16–21%. There are also important differences in earnings dynamics for men who transition into (or out of) same‐sex versus opposite‐sex live‐in relationships. Individual fixed effects estimates show that opposite‐sex partnerships are associated with increased earnings for men, while same‐sex partnerships are associated with small declines in earnings that are statistically indistinguishable from zero. For women, we find evidence of an earnings premium for lesbians, driven largely by increased labour supply on the intensive margin.     

Revisiting Exports and Foreign Direct Investment in Vietnam

Since 1986, Vietnam has undertaken various reform measures in the trade and foreign investment area. This paper finds significant contributions of world trade, and competitiveness and liberalization effects to Vietnam's export growth over the period 1997–2008. Vietnam's exports became more competitive and better complemented the import demand of Vietnam's trade partners. In addition, dynamic comparative advantage became evident in many products, but significant room remains for improving export competitiveness. Foreign direct investment (FDI) inflows also increased and helped stimulate Vietnam's exports. FDI inflows have increased in both the short‐ and long‐term, yet are only of a limited magnitude. This necessitates more effective measures to enhance the linkages between FDI and domestic enterprises.