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The Initiative on Triple Bottom Line Development

The triple bottom line (TBL) is a phrase that originated in the business sector to provide a way to think about the economic, environmental, and social value of investments. The triple bottom line attempts to provide a more accurate description of investment impact by accounting for important costs and benefits that do not appear on traditional profit and loss statements.  By providing a more complete view of investment impact, the triple bottom line can help ensure that resources are efficiently and strategically employed and that investments align with community priorities.

The mission of The Initiative on Triple Bottom Line Development is to increase capacity for development that delivers economic, environmental, and social performance. We do this through research, education, and strategic initiatives, in collaboration with leaders in the public, private, non-profit, and philanthropic sectors.

The Initiative on Triple Bottom Line Development is led by Dr. Janet Hammer.  Janet has twenty years of experience working on sustainability issues and holds degrees in policy analysis and planning, city and regional planning, energy management and policy, education, and urban studies.  She can be reached at

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