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Research summary: The recent surge of interest in \"ecosystems\" in strategy research and practice has mainly focused on what ecosystems are and how they operate. We complement this literature by considering when and why ecosystems emerge, and what makes them distinct from other governance forms. We argue that modularity enables ecosystem emergence as it allows a set of distinct yet interdependent organizations to coordinate without full hierarchical fiat. We show how ecosystems address multilateral dependences based on various types of complementarities—supermodular or unique, unidirectional or bidirectional—which determine the ecosystem's value-add. We argue that at the core of ecosystems lie nongeneric complementarities, and the creation of sets of roles that face similar rules. We conclude with implications for mainstream strategy and suggestions for future research. Managerial summary: We consider what makes ecosystems different from other business constellations, including markets, alliances, or hierarchically managed supply chains. Ecosystems, we posit, are interacting organizations, enabled by modularity, not hierarchically managed, bound together by the nonredeployability of their collective investment elsewhere. Ecosystems add value as they allow managers to coordinate their multilateral dependence through sets of roles that face similar rules, thus obviating the need to enter into customized contractual agreements with each partner. We explain how different types of complementarities (unique or supermodular, generic or specific, uni- or bi-directional) shape ecosystems and offer a \"theory of ecosystems\" that can explain what they are, when they emerge, and why alignment occurs. Finally, we outline the critical factors affecting ecosystem emergence, evolution, and success—or failure.

The study is aimed at investigating the environmental and economic impacts of paper consumption and computers used in the banking sector operating in Palestine. The descriptive and quantitative method has been used, and the data was annual covering the period 2016-2018. The study has found out that the total cost of using paper in banks operating in Palestine was about 3.24 million dollars since the banks consume about 658.4 tons of paper as it is necessary to produce this amount of paper to about 16 thousand pine trees, 25 million btus of energy, and 13.5 million gallons. As for the total costs of using computers in the banks operating in Palestine, they amounted to about 7.6 million US dollars, and about 122 tons of different minerals and materials are required to manufacture computers in the banks in Palestine. About 1.52 GW per year is required to operate all computers, which causes the release of greenhouse gases equivalent to the consumption of 2495 barrels of oil.

This article provides a brief introduction to the physical science of climate change, aimed towards economists. We begin by describing the physics that controls global climate, how scientists measure and model the climate system, and the magnitude of human-caused emissions of carbon dioxide. We then summarize many of the climatic changes of interest to economists that have been documented and that are projected in the future. We conclude by highlighting some key areas in which economists are in a unique position to help climate science advance. An important message from this final section, which we believe is deeply underappreciated among economists, is that all climate change forecasts rely heavily and directly on economic forecasts for the world. On timescales of a half-century or longer, the largest source of uncertainty in climate science is not physics, but economics.

Ianalyze the impact of a firm's environmental profile on its cost of equity and debt capital. Using implied cost of capital derived from analysts' earnings estimates, I find that investors demand significantly higher expected returns on stocks excluded by environmental screens (such as hazardous chemical, substantial emissions, and climate change concerns) compared to firms without such environmental concerns. Lenders also charge a significantly higher interest rate on the bank loans issued to firms with these environmental concerns. I provide evidence that the environmental profile of a firm is not simply proxying for an omitted component of its default risk. Further, firms with these environmental concerns have lower institutional ownership and fewer banks participate in their loan syndicate than firms without such environmental concerns. These results suggest that exclusionary socially responsible investing and environmentally sensitive lending can have a material impact on the cost of equity and debt capital of affected firms. This paper was accepted by Brad Barber, finance .

This paper contributes to biodiversity and species extinction literature by examining the relationship between corporate accountability in terms of species protection and factors affecting such accountability from forward-thinking companies. We use triangulation of theories, namely deep ecology, legitimacy, and we introduce a new perspective to the stakeholder theory that considers species as a ‘stakeholder’. Using Poisson pseudo-maximum likelihood (PPML) regression, we examine a sample of 200 Fortune Global companies over 3 years. Our results indicate significant positive relations between ecologically conscious companies that are accountable for the protection of biodiversity and species extinction and external assurance, environmental performance, partnerships with socially responsible organizations and awards for sustainable activities. Our empirical results appear to be robust in controlling for possible endogeneities. Our findings contribute to the discussion on the concern of species loss and habitat destruction in the context of corporate accountability, especially in responding to the sixth mass extinction event and COVID-19 crisis. Our results can also guide the policymakers and stakeholders of the financial market in better decision making.

How should carbon be taxed as a part of fiscal policy? The literature on optimal carbon pricing often abstracts from other taxes. However, when governments raise revenues with distortionary taxes, carbon levies have fiscal impacts. While they raise revenues directly, they may shrink the bases of other taxes (e.g. by decreasing employment). This article theoretically characterizes and then quantifies optimal carbon taxes in a dynamic general equilibrium climate–economy model with distortionary fiscal policy. First, this article establishes a novel theoretical relationship between the optimal taxation of carbon and of capital income. This link arises because carbon emissions destroy natural capital: they accumulate in the atmosphere and decrease future output. Consequently, this article shows how the standard logic against capital income taxes extends to distortions on environmental capital investments. Second, this article characterizes optimal climate policy in sub-optimal fiscal settings where income taxes are constrained to remain at their observed levels. Third, this article presents a detailed calibration that builds on the seminal DICE approach but adds features essential for a setting with distortionary taxes, such as a differentiation between climate change production impacts (e.g. on agriculture) and direct utility impacts (e.g. on biodiversity existence value). The central quantitative finding is that optimal carbon tax schedules are 8–24% lower when there are distortionary taxes, compared to the setting with lump-sum taxes considered in the literature.

Unsustainable consumption is an important cause of the continued deterioration of the global environment. The authors compare the ecological impact of anticonsumption lifestyles and environmental concern. Findings indicate that high scores on anticonsumption lifestyles (voluntary simplicity, frugality, and tightwadism) and environmental concern are associated with lower ecological impact. More precisely, the findings show that these lifestyles are not associated with a reduction in consumption, as their stereotypes would imply. Voluntary simplicity (β = −.286) and tightwadism (β = −.216) show a stronger association with lower ecological impact (i.e., are less harmful to the environment) than environmental concern (β = −.190), whereas frugality (β = −.089) is not associated with reduced impact after demographic variables were controlled for. The findings pertaining to voluntary simplicity and tightwadism suggest that resisting consumption is an alternative path toward more sustainable consumption. Public policy makers and marketers can build on these findings and include reduced consumption and sufficiency in their sustainability strategies.

Environmental quality in many developing countries is poor and generates substantial health and productivity costs. However, the few existing measures of marginal willingness to pay (MWTP) for environmental quality improvements indicate low valuations by affected households. This paper argues that this seeming paradox is the central puzzle at the intersection of environmental and development economics: Given poor environmental quality and high health burdens in developing countries, why is MWTP seemingly so low? We develop a conceptual framework for understanding this puzzle and propose four potential explanations for why environmental quality is so poor: (1) due to low income levels, individuals value increases in income more than marginal improvements in environmental quality; (2) the marginal costs of environmental quality improvements are high; (3) political economy factors undermine efficient policymaking; and (4) market failures such as weak property rights and missing capital markets distort MWTP for environmental quality. We review the literature on each explanation and discuss how the framework applies to climate change, which is perhaps the most important issue at the intersection of environment and development economics. The paper concludes with a list of promising and unanswered research questions for the emerging sub-field of \"envirodevonomics.\"

Environmental concerns are closely associated with economic activities. Without considering economic and social impacts, any policy to reduce environmental degradation becomes futile. Environmental economics is an expanding area that searches for solutions to environmental problems in tandem with the consideration of economic development. This book provides an overview of the environment-economy interface, natural resources, environmental valuation and examples of environmental policies. It contains case studies, short descriptions of current issues of global importance and international initiatives for the environment. The book's primary objective is to make the readers aware of the interdependence between environment and economics. Young students, trainees, teachers and academicians will find this book useful as an introduction to environmental economics.

People have become more conscientious about the environment in recent years. Increasing environmental awareness drives customers to be more selective about environmentally friendly products and forces governments to adopt environmentally friendly policies. As a result, competition in the market becomes more challenging. Thus, companies cannot remain indifferent to adopting environmentally friendly strategies to be sustainable. In this regard, this study investigates the effect of green innovation on firm performance. We also examined whether the environmental uncertainty moderates the investigated effect. For this purpose, first, data were collected from the first 1000 exporting firms declared in 2019 by the Turkey Exporters Assembly using a survey method. Secondly, factor analyses and regression analyses were performed with the data set obtained from 136 companies. As a result of the analysis, it was determined that green innovation increases both environmental performance and economic performance. It also was found that green innovation positively affects firm performance, but environmental uncertainty reduces this effect. According to these results, it was offered that firms should increase their green innovation activities to achieve better outputs and seek ways to reduce environmental uncertainty to keep these outputs at the maximum level. Finally, the research includes some considerations on the positive implications and potential of green innovation in an open-innovation context.