The Perils of Balance Testing in Experimental Design: Messy Analyses of Clean Data

Widespread concern over the credibility of published results has led to scrutiny of statistical practices. We address one aspect of this problem that stems from the use of balance tests in conjunction with experimental data. When random assignment is botched, due either to mistakes in implementation or differential attrition, balance tests can be an important tool in determining whether to treat the data as observational versus experimental. Unfortunately, the use of balance tests has become commonplace in analyses of “clean” data, that is, data for which random assignment can be stipulated. Here, we show that balance tests can destroy the basis on which scientific conclusions are formed, and can lead to erroneous and even fraudulent conclusions. We conclude by advocating that scientists and journal editors resist the use of balance tests in all analyses of clean data. Supplementary materials for this article are available online     

CEO Duality,Agency Costs,and Internal Capital Allocation Efficiency

This study examines the impact of CEO duality on firms’ internal capital allocation efficiency. We observe that when the CEO is also chair of the board, diversified firms make inefficient investments, as they allocate more capital to business segments with relatively low growth opportunities over segments with high growth opportunities. The adverse impact of CEO duality on investment efficiency prevails only among firms that face high agency problems, as captured by high free cash flows, staggered board structure and low board independence. Depending on the severity of the agency problem, CEO duality is associated with a decrease in industry‐adjusted investment in high‐growth segments of 1% to 2.1% over the following year, relative to that in low‐growth segments. However, CEOs’ equity‐based compensation curbs the negative effect of CEO duality on internal capital allocation efficiency. Overall, the findings of this study offer strong support for the agency theory and postulate the internal capital allocation policy as an important channel through which CEO duality lowers firm value in diversified firms.     

A performative exploration of the lifeworlds of human capital and financial capital: an intellectual capital case vignette

Journal of Management and Governance - The primary purpose here is to briefly outline and illustrate how one particular relationist/realist ontological approach to performative research, with a...     

Live audience responses to live televised election debates: time series analysis of issue salience and party salience on audience behavior

Televised political debates are the platforms for party leaders to outline their party's political programs and to attack those of their political opponents. At the same time journalists who moderate the debates are testing the party leaders’ ability to clearly outline and defend their programs. Television audiences of election debates evaluate these party leaders and political parties based on their television performances. Prior to the social media era, viewers’ evaluations were collected through phone surveys or web questionnaires. Nowadays viewers share their opinions in real-time on social media. Particularly Twitter is used in the Netherlands as the platform to share these opinions. In this study tweets produced by the audiences of five different televised debates that took place during the campaign for the Dutch 2012 parliamentary elections are analyzed in terms of tweeting about politicians and parties as well as political issues, as well as the content of the debates. This allowed us, using time series analysis, to test the relation between issue salience in debates and issue salience of the audience on Twitter. The issues of ‘Employment and income’ and ‘Europe’ were the most tweeted about, roughly aligning with the attention these issues received in televised debates. Findings further show there are consistent audience reactions to issues discussed in the debates: issues of ‘Housing’, ‘Care for the needy', and ‘Europe’ showing the strongest effects. However, candidates and parties are not explicitly associated by people active on Twitter when certain political issues are being debated on TV.     

Man Up,Man Down: Race–Ethnicity and the Hierarchy of Men in Female‐Dominated Work

Scholars have largely overlooked the significance of race and socioeconomic status in determining which men traverse gender boundaries into female‐dominated, typically devalued, work. Examining the gender composition of the jobs that racial minority men occupy provides critical insights into mechanisms of broader racial disparities in the labor market—in addition to stalled occupational desegregation trends between men and women. Using nationally representative data from the three‐year American Community Survey (2010–2012), we examine racial/ethnic and educational differences in which men occupy gender‐typed jobs. We find that racial minority men are more likely than white men to occupy female‐dominated jobs at all levels of education—except highly educated Asian/Pacific Islander men—and that these patterns are more pronounced at lower levels of education. These findings have implications for broader occupational inequality patterns among men as well as between men and women.     

Social Work Education's Role in Addressing People and a Planet at Risk

As the nature of the earth's ecological crisis becomes increasingly dire and impossible to ignore and as global concern continues to increase, social work, with its investment in issues of justice and its commitment to a person-in-environment perspective, needs to more aggressively evaluate its place in this crisis. This paper presents a study designed to explore US social work students' attitudes, interests in, and practices related to the environment, as well as their perceptions of the place for environmental issues in the social work curriculum. This study's findings suggest that social work students' attitudes toward the environment are generally consonant with those of the US population, and that there is strong interest in enhancing the amount and scope of exposure to environmental issues in the social work curriculum. A sizable majority of all social work students surveyed view environmental justice as an important aspect of social justice and a viable area of concern for social workers, and they expressed an interest in seeing more content on environmental justice in social work education. Suggestions for integrating this content into the curriculum via inter- and trans-disciplinary, and service-learning approaches are discussed.     

The impact of mosses on the growth of neighbouring vascular plants,substrate temperature and evapotranspiration on an extensive green roof

Currently the majority of vegetation used on shallow extensive green roofs are species of Sedum, which are able to survive in the harsh green roof environment. While mosses frequently colonize green roofs in Europe, intentional planting of mosses on green roofs is less common, especially in North America. Mosses may contribute to the ecosystem services provided by green roofs, and may act as facilitators of vascular plants. This study examined the effect of three different moss species on soil temperature, water loss rates and the growth of neighbouring vascular plant species. Overall, the presence of mosses in this experiment impacted the neighbour species differently, suggesting that mosses are best used in particular species combinations. One species of grass showed a net benefit of moss neighbours, suggesting that facilitation may be operating. Mosses reduced soil temperature relative to bare substrates; net evapotranspiration of green roof modules planted with mosses varied depending on the identity of moss and neighbour species.     

An agent-based model for evaluating reforms of the National Flood Insurance Program: A benchmarked model applied to Jamaica Bay,NYC

Coastal flood risk is expected to increase as a result of climate change effects, such as sea level rise, and socioeconomic growth. To support policymakers in making adaptation decisions, accurate flood risk assessments that account for the influence of complex adaptation processes on the developments of risks are essential. In this study, we integrate the dynamic adaptive behavior of homeowners within a flood risk modeling framework. Focusing on building-level adaptation and flood insurance, the agent-based model (DYNAMO) is benchmarked with empirical data for New York City, USA. The model simulates the National Flood Insurance Program (NFIP) and frequently proposed reforms to evaluate their effectiveness. The model is applied to a case study of Jamaica Bay, NY. Our results indicate that risk-based premiums can improve insurance penetration rates and the affordability of insurance compared to the baseline NFIP market structure. While a premium discount for disaster risk reduction incentivizes more homeowners to invest in dry-floodproofing measures, it does not significantly improve affordability. A low interest rate loan for financing risk-mitigation investments improves the uptake and affordability of dry-floodproofing measures. The benchmark and sensitivity analyses demonstrate how the behavioral component of our model matches empirical data and provides insights into the underlying theories and choices that autonomous agents make.