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Tobin's q [a] (or the q ratio, and Kaldor's v), is the ratio between a physical asset's market value and its replacement value.It was first introduced by Nicholas Kaldor in 1966 in his paper: Marginal Productivity and the Macro-Economic Theories of Distribution: Comment on Samuelson and Modigliani.
[6] [7] [8] Quizlet's blog, written mostly by Andrew in the earlier days of the company, claims it had reached 50,000 registered users in 252 days online. [9] In the following two years, Quizlet reached its 1,000,000th registered user. [10] Until 2011, Quizlet shared staff and financial resources with the Collectors Weekly website. [11]
Sustainable agriculture is an approach to farming that utilizes technology in a way that ensures food protection, while ensuring the long-term health and productivity of agricultural systems, ecosystems, and communities. Historically, technological advancements have significantly contributed to increasing agricultural productivity and reducing ...
The following outline is provided as an overview of and topical guide to sustainability: . Sustainability – capacity to endure. For humans, sustainability is the long-term maintenance of well being, which has environmental, economic, and social dimensions, and encompasses the concept of stewardship and responsible resource management.
Sustainable development overlaps with the idea of sustainability which is a normative concept. [5] UNESCO formulated a distinction between the two concepts as follows: "Sustainability is often thought of as a long-term goal (i.e. a more sustainable world), while sustainable development refers to the many processes and pathways to achieve it." [6]
It defined sustainable development as meeting "the needs of the present without compromising the ability of future generations to meet their own needs". [1] This description of sustainable development has since been referenced in many definitions and explanations of sustainable energy. [1] [4] [5] [6]
Sustainability is regarded as a "normative concept".[5] [22] [23] [2] This means it is based on what people value or find desirable: "The quest for sustainability involves connecting what is known through scientific study to applications in pursuit of what people want for the future."
The UK's average ecological footprint is 5.45 global hectares per capita (gha) with variations between regions ranging from 4.80 gha (Wales) to 5.56 gha (East England). [40] BedZED, a 96-home mixed-income housing development in South London, was designed by Bill Dunster Architects and sustainability consultants BioRegional for the Peabody Trust.