I n this paper we examine social capital and its relationship with performance at the organizational level. We predict that both internal and external social capital will have a positive effect on organizational performance. We test our hypotheses in 88 urban public schools where we collected data from principals, teachers, parents, and students. Results indicate that both internal social capital (relations among teachers) and external social capital (relations between the principal and external stakeholders) predict student achievement in mathematics and reading. These effects were sustained over time for reading achievement, providing support for a causal relationship between social capital and performance. We provide evidence that social capital's impact on student achievement in math-but not reading-is mediated by the quality of instruction provided by teachers. These results underscore the importance of context in studies of social capital.

We focus on two fundamental dimensions of corruption in organizations: (1) whether the individual or the organization is the beneficiary of the corrupt activity and (2) whether the corrupt behavior is undertaken by an individual actor or by two or more actors. We use these dimensions to define a new conceptualization of corruption at the organization level: the organization of corrupt individuals. We contrast this conceptualization with the prevailing concept of organizational corruption and develop propositions that highlight their differences.

We examine the relationship between lean manufacturing practices and environmental performance as measured in terms of air emissions and resource use. We draw on two unique surveys of 31 automobile assembly plants in North America and Japan, which contain information on manufacturing practice and environmental performance, as well as in-depth interviews with 156 plant level employees at 17 assembly plants. Our survey results and interviews suggest that lean management and reduction of air emissions of volatile organic compounds (VOCs) are associated negatively. Lean manufacturing practices contribute to more efficient use of paints and cleaning solvents, but these in-process changes are not sufficient to meet the most stringent air regulations. We found some evidence to support the link between lean practices and resource efficiency. While our survey results were in hypothesized direction, they were not statistically significant. In-depth semi-structured interviews, however, suggest a more robust relationship, and we use them to describe some mechanisms by which all three aspects of lean management (buffer minimization, work systems, and human resource management) may be related to environmental management practices and performance. (LEAN MANUFACTURING; ENVIRONMENTAL PERFORMANCE; HIGH-INVOLVEMENT WORK; RESOURCE USE) *

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