Extinction for two parabolic stochastic PDE's on the lattice

It is well known that, starting with finite mass, the super-Brownian motion dies out in finite time. The goal of this article is to show that with some additional work, one can prove finite time die-out for two types of systems of stochastic differential equations on the lattice Z^d. Our first system involves the heat equation on the lattice Z^d, with a nonlinear noise term u(t,x)^gamma dB_x(t), with 1/2 <= gamma < 1. The B_x are independent Brownian motions. When gamma = 1/2, the measure which puts mass u(t,x) at x is a super-random walk and it is well-known that the process becomes extinct in finite time a.s. Finite-time extinction is known to be a.s. false if gamma = 1. For 1/2 < gamma < 1, we show finite-time die-out by breaking up the solution into pieces, and showing that each piece dies in finite time. Our second example involves the mutually catalytic branching system of stochastic differential equations on Z^d, which was first studied by Dawson and Perkins. Roughly speaking, this process consists of 2 superprocesses with the continuous time simple random walk as the underlying spatial motion. Furthermore, each process stimulates branching and dying in the other process. By using a somewhat different argument, we show that, depending on the initial conditions, finite time extinction of one type may occur with probability 0, or with probability arbitrarily close to 1

University-Community Collaboration for Climate Justice Education and Organizing: Partnerships in Canada, Brazil, and Africa

In the coming decades, countries around the world will face increasingly severe challenges related to global climate change. While the details vary from country to country, the impacts will be especially grave for marginalized people, whose access to food, potable water, and safe shelter may be threatened due to fluctuations in rainfall and temperature and to disasters related to extreme weather events. International strategies for addressing climate change are in disarray. The complicated financial and carbon-trading mechanisms promoted by the United Nations and other global institutions are far too bureaucratic, weak, internally inconsistent, and scattered to represent meaningful solutions to climate change. Already the housing, health, and livelihoods of marginalized people worldwide are being threatened by the ramifications of climate change. This means that the marginalized in every community, by definition, have expertise in how priorities should be set to address climate change. Their experiences, knowledge, and views must be part of local, regional, national, and international governance—including urban planning and housing, water management, agriculture, health, and finance policies.This research was supported by the International Development Research Centre, grant number IDRC GRANT NO. 106002-00

Local Economies, Trade, and Global Sustainability

Bioregional and "ecological economics" theory describes the growth of local economic linkages as vital to move post-industrial economies in the direction of sustainability. This involves expanding local stewardship over environmental and economic resources, so that progressively more production for local needs can be done within the community. Far from existing solely in the realm of theory, this is a pattern which is becoming more and more familiar in many parts of North America and Europe. The blossoming initiatives to create local, community-centred economies can be understood in light of the long history of environmental challenges faced by people living in the industrialized North, and the double economic blows of recession and trade liberalization/globalization exemplified by the passage of GATT and NAFTA and the development of the EC in the 1990s.This paper discusses the dynamic relationship between globalization and local economic development in the North from both theoretical and practical viewpoints. It provides examples from Toronto, Canada of the synergy among environmental awareness, community organizing and "alternative" employment creation (e.g. in environmental remediation and energy conservation activities) which can accompany recession or trade-induced worker layoffs. The resulting local economic patterns tend to be "greener" and more socially sustainable than the globally-tied economic linkages they replace.This research was supported by the Social Sciences and Humanities Research Council of Canad

Building Commons Governance for a Greener Economy

Much recent work in ecological economics and political ecology, including calls for “de-growth” in the transition towards more sustainable economies, focuses on commons as a promising paradigm for sustainable governance institutions.  The vision involves people who depend on or have an interest in a resource or asset, working together co-operatively to use that asset for production, service provision, and exchange which creates value and well-being while integrating ecological care, justice, and long-term planning to the best of diverse communities’ abilities. This includes institutions such as co-ops, land trusts, and non-market or beyond-market collective ways of organizing production, distribution, consumption, and waste or materials management.Developing such collective institutions requires nurturing the skills and abilities needed to create and maintain them: empathy, communication and listening skills, a sense of shared purpose, creativity, dispute resolution across differences, long-term vision, environmental awareness and stewardship, among others. Transformative education praxis and transdisciplinarity facilitate the growth of these skills and abilities in children and adults, as Paulo Freire and other transformative learning practitioners have shown (Gadotti 2009; O’Sullivan 1999;Gutierrez &amp; Prado 1998). Transformative pedagogy, including both eco-pedagogy and transdisciplinarity, is foundational as human society evolves institutions for sustainability such as commons.This research was supported by the International Development Research Centre, grant number IDRC GRANT NO. 106002-00

Equitable, Ecological Degrowth: Feminist Contributions

This paper uses feminist ecological economics and ecofeminist methodologies and theory to contribute to Degrowth in theory and practice. These feminist contributions involve highlighting unpaid work and ecological services, redistribution, and participatory processes as crucially important in developing the new paradigm and movement for equitable material Degrowth.This research was supported by the Social Sciences and Humanities Research Council of Canad

Public participation in watershed management:international practices for inclusiveness

This paper outlines a number of examples from around the world of participatory processes for watershed decision-making, and discusses how they work, why they are important, their social and ecological potential, and the practical details of how to start, expand and develop them. Because of longstanding power differentials in all societies along gender, class and ethnic lines, equitable public participation requires the recognition that different members of society have different kinds of relationships with the environment in general, and with water in particular. From a range of political perspectives, inclusive participatory governance processes have many benefits. The author has recently completed a 5 year project linking universities and NGOs in Brazil and Canada to develop methods of broadening public engagement in local watershed management committees, with a special focus on gender and marginalized communities. The innovative environmental education and multi-lingual international public engagement practices of the Centre for Socio-Environmental Knowledge and Care of the La Plata Basin (which spans Brazil, Argentina, Uruguay, Paraguay and Bolivia) are also discussed in this paper.This research was supported by the International Development Research Centr

Feminist Understanding of Productivity

The concept of productivity, meaning output per unit of input, is at once general and specific. Economists have used productivity as a very specific measure, denominated in dollars, which shows the output of a produced or consumed good per unit of labour or capital used in the production process. However, productivity can also be understood more broadly as a fundamental human value which denotes optimal use of the natural environment for individual, social and cultural benefit. This involves questioning, testing and replacing many of the static assumptions of the neoclassical economics paradigm: What are the significant inputs and outputs? Can their cost or value be measured in dollars? What additional, related outputs and inputs are silent, "external", or ignored in the production and consumption process? How do improvements in productivity take place, and how can they be measured and fostered? Feminist economists critique the exclusion of many important aspects of production and reproduction from most economic equations; the discussion on alternative ways of valuing inputs and inclusionary approaches to the question of productivity is well advanced in feminist debates. Building on recent research in ecological economics, feminist economics, community economic development, political ecology, and social/cultural studies, this paper explores and articulates several alternative conceptualizations of productivity. The paper's intent is to re-examine the capitalist concept of "productivity" which Maria Mies calls "the most formidable hurdle in our struggle to come to an understanding of women's labour" (Mies, Patriarchy and Accumulation on a World Scale, p. 48).This research was supported by the Social Sciences and Humanities Research Council of Canad

Feminist Ecological Economics

This article provides an overview of feminist ecological economics, with special attention to three particular aspects: its theoretical foundations and relation to other schools of thought, its implications for activism and public policy, and directions for future research work.This research was supported by the Social Sciences and Humanities Research Council of Canad

Trade, transition paths, and sustainable economies

The main criticisms of trade from a sustainability viewpoint are that it accelerates resource depletion and pollution, harms income distribution both locally and internationally, and undermines democratic institutions. After considering the relationship between trade and "sustainability," this paper discusses a number of feedback mechanisms which promote the kind of trade that is more sustainable - for the South as well as the North. The role of technological change, a model of the relationship between production and "sustaining services," data needs and research priorities are also discussed

Feminist Ecological Economics and Sustainability

New developments in feminist ecological economics and ecofeminist economics are contributing to the search for theories and policy approaches to move economies toward sustainability. This paper summa- rizes work by ecofeminists and feminist ecological economists which is relevant to the sustainability challenge and its implications for the discipline of economics. Both democracy and lower material throughputs are generally seen as basic principles of economic sustainability. Feminist theorists and feminist ecological econ- omists offer many important insights into the conundrum of how to make a democratic and equity-enhancing transition to an economy based on less material throughput. These flow from feminist research on unpaid work and caring labor, provisioning, development, valuation, social reproduction, non-monetized exchange relationships, local economies, redistribution, citizenship, equity-enhancing political institutions, and labor time, as well as creative modeling approaches and activism-based theorizing.This research was supported by the Social Sciences and Humanities Research Council of Canad