scholarly journals A biome-wide experiment to assess the effects of propagule size and treatment on the survival of Portulacaria afra (spekboom) truncheons planted to restore degraded subtropical thicket of South Africa

PLoS ONE ◽  
2021 ◽  
Vol 16 (4) ◽  
pp. e0250256
Author(s):  
Marius L. van der Vyver ◽  
Anthony J. Mills ◽  
Richard M. Cowling
Keyword(s):  
Ecological Restoration ◽  
Evidence Base ◽  
Costs And Benefits ◽  
Economic Costs ◽  
Propagule Size ◽  
Ecosystem Carbon ◽  
Restoration Success ◽  
Key Drivers ◽  
Semi Arid Region

Insights from biome-wide experiments can improve efficacy of landscape-scale ecological restoration projects. Such insights enable implementers to set temporal and geographical benchmarks and to identify key drivers of success during the often decades-long restoration trajectory. Here we report on a biome-wide experiment aimed at informing the ecological restoration of thousands of hectares of degraded subtropical thicket dominated by the succulent shrub, Portulacaria afra (spekboom). Restoration using spekboom truncheons has the potential to sequester, for a semi-arid region, large amounts of ecosystem carbon, while regenerating a host of associated ecosystem services. This study evaluates, after about three years post-propagation, the effects of spekboom truncheon size and treatment on survivorship in 40 fence-enclosed (0.25 ha) plots located in target habitat across the entire spekboom thicket biome. In each plot, locally harvested spekboom truncheons, comprising eight size/treatment combinations, were planted in replicated rows of between 24 and 49 individuals, depending on treatment. The experiment assessed the role of truncheon size, spacing, application of rooting hormone and watering at planting on survivorship percentage as an indicator of restoration success. All eight combinations recorded extreme minimum survivorship values of zero, while the range of extreme maximum values was 70-100%. Larger truncheons (>22.5 mm diameter) had almost double the survivorship (ca. 45%) than smaller truncheons (< 15 mm) (ca. 25%). Planting large, untreated truncheons at 1 m intervals—as opposed to 2 m intervals recommended in the current restoration protocol—resulted in no significant change in survivorship. The application of rooting hormone and water at planting had no significant effect on restoration success for both large and small truncheons. While our results do not provide an evidence base for changing the current spekboom planting protocol, we recommend research on the financial and economic costs and benefits of different propagation strategies in real-world contexts.

scholarly journals Analysis and Modeling of Corruption among Entrepreneurs

2020 ◽  
Vol 8 (16) ◽  
pp. 262-311
Author(s):  
Zhou Xiaohu ◽  
Mohammad Heydari ◽  
Kin Keung Lai ◽  
Zheng Yuxi
Keyword(s):  
Empirical Investigation ◽  
Cost Benefit ◽  
Self Control ◽  
Third Party ◽  
Costs And Benefits ◽  
Economic Costs ◽  
General Hypothesis ◽  
Rational Player ◽  
The Cost

Bribery may eradicate social welfare. In the current research, we inspected the mechanism of bribery behaviour based on the (NASH Theory or Non-Cooperative static game theory) which stated by John Forbes Nash Jr. in 1978. With the general hypothesis of “Rational Player,” two bimatrix game models are settled to evaluate the briber and the bribee strategy choice. After discussing the cost-benefit of the (Participants or players), some useful conclusions and dissolve analysis are drawn out. The current study provides three novel experiments that put both metaphors to the test. Overall, a little quantitative study has investigated sequential unethical behaviour. Insomuch prior studies focus on third-party observers’ acceptance of continuous vs. abrupt immoral acts, or the role of self-control and ethical disengagement in the slippery slope of lesser cheating acts empirical investigation contrasting ongoing to the abrupt occurrence of corruption is missing altogether. Recent advances in empirical corruption studies methodology allow the first examination of these different procedures while preserving the economic costs and benefits constant. In the current study, we used a recently improved corruption game by [Köbis, van Prooijen, Righetti, Van Lange, 2015].

Real Earnings Management and Long-Term Operating Performance: The Role of Reversals in Discretionary Investment Cuts

2015 ◽  
Vol 91 (4) ◽  
pp. 1219-1256 ◽  
Author(s):  
Patrick Vorst
Keyword(s):  
Earnings Management ◽  
Operating Performance ◽  
Real Earnings Management ◽  
Costs And Benefits ◽  
Economic Costs ◽  
Accounting Numbers

ABSTRACT I examine whether a reversal of an abnormal cut in discretionary investments is associated with the degree to which the cut is reflective of real earnings management (REM) and whether and how it predicts future operating performance. I define a reversal as occurring when a firm cuts discretionary investments to a below-expected level in one period and reverts back to at least the expected level of investment during the next period. Unlike accrual earnings management, REM involves deliberately altering the operations of the firm to influence reported accounting numbers. To the extent that such interventions diverge from optimality, they can expose the firm to real economic costs. I find that a reversal of an abnormal cut in discretionary investments in the year after the cut has taken place is indicative of REM. I further find that, on average, reversing cuts are associated with lower future operating performance, but that such results vary significantly depending on the various incentives to engage in REM, as well as other factors that affect its associated costs and benefits. These findings are of interest to investors, regulators, and academics with respect to the identification and consequences of REM.

Hostile Takeovers and Anti-takeover Defenses in the Russian Corporate Market

2007 ◽  
pp. 70-84 ◽  
Author(s):  
E. Demidova
Keyword(s):  
Cost Benefit Analysis ◽  
Cost Benefit ◽  
Benefit Analysis ◽  
Costs And Benefits ◽  
Hostile Takeovers ◽  
Russian Market ◽  
Takeover Defenses ◽  
The Cost ◽  
European Markets

This article analyzes definitions and the role of hostile takeovers at the Russian and European markets for corporate control. It develops the methodology of assessing the efficiency of anti-takeover defenses adapted to the conditions of the Russian market. The paper uses the cost-benefit analysis, where the costs and benefits of the pre-bid and post-bid defenses are compared.

Concealment of Illegally Obtained Assets in Nigeria: Revisiting the Role of the Churches in Money Laundering

2020 ◽  
Vol 28 (1) ◽  
pp. 106-121
Author(s):  
Kato Gogo Kingston
Keyword(s):  
Economic Growth ◽  
Money Laundering ◽  
Financial Crime ◽  
The Past ◽  
Key Drivers ◽  
Nigerian Government

Financial crime in Nigeria – including money laundering – is ravaging Nigeria's economic growth. In the past few years, the Nigerian government has made efforts to tackle money laundering by enacting laws and setting up several agencies to enforce the laws. However, there are substantial loopholes in the regulatory and enforcement regimes. This article seeks to unravel the involvement of the churches as key drivers in money laundering crimes in Nigeria. It concludes that the permissive secrecy which enables churches to conceal the names of their financiers and donors breeds criminality on an unimaginable scale.

Endangered Butterflies and their Non-Native Host Plants: Examining Shifting Values of Belonging in Restoration

2019 ◽  
Vol 3 (1) ◽  
pp. 1-9
Author(s):  
Robert M. Anderson ◽  
Amy M. Lambert
Keyword(s):  
Ecological Restoration ◽  
Native Species ◽  
Puget Sound ◽  
A Value ◽  
The Social ◽  
Remote Island ◽  
Scientific Truth ◽  
Native Host

The island marble butterfly (Euchloe ausonides insulanus), thought to be extinct throughout the 20th century until re-discovered on a single remote island in Puget Sound in 1998, has become the focus of a concerted protection effort to prevent its extinction. However, efforts to “restore” island marble habitat conflict with efforts to “restore” the prairie ecosystem where it lives, because of the butterfly’s use of a non-native “weedy” host plant. Through a case study of the island marble project, we examine the practice of ecological restoration as the enactment of particular norms that define which species are understood to belong in the place being restored. We contextualize this case study within ongoing debates over the value of “native” species, indicative of deep-seated uncertainties and anxieties about the role of human intervention to alter or manage landscapes and ecosystems, in the time commonly described as the “Anthropocene.” We interpret the question of “what plants and animals belong in a particular place?” as not a question of scientific truth, but a value-laden construct of environmental management in practice, and we argue for deeper reflexivity on the part of environmental scientists and managers about the social values that inform ecological restoration.

The Ethics of Petroleum

2017 ◽  
Author(s):  
Jonathon W. Moses ◽  
Bjørn Letnes
Keyword(s):  
Corporate Social Responsibility ◽  
Social Responsibility ◽  
Host Country ◽  
Corporate Citizenship ◽  
Costs And Benefits ◽  
Political Actors ◽  
Oil Companies ◽  
Corporate Social ◽  
Oil Company

This chapter considers the role of international oil companies (IOCs) as global political actors with significant economic and political power. In doing so, we weigh the ethical costs and benefits for individuals, companies, and states alike. Using the concepts of “corporate social responsibility” (CSR) and “corporate citizenship” as points of departure, we consider the extent to which international oil companies have social and political responsibilities in the countries where they operate and what the host country can do to encourage this sort of behavior. We examine the nature of anticorruption legislation in several of the sending countries (including Norway), and look closely at how the Norwegian national oil company (NOC), Statoil, has navigated these ethical waters.

The Acceptance of Party Unity in Parliamentary Democracies

2017 ◽  
Author(s):  
David M. Willumsen
Keyword(s):  
Political Parties ◽  
Costs And Benefits ◽  
Parliamentary Democracies ◽  
Survey Questions ◽  
Ideal Policy ◽  
Central Argument ◽  
The Individual ◽  
Policy Incentives

The central argument of this book is that voting unity in European legislatures is not primarily the result of the ‘disciplining’ power of the leadership of parliamentary parties, but rather the result of a combination of ideological homogeneity through self-selection into political parties and the calculations of individual legislators about their own long-term benefits. Despite the central role of policy preferences in the subsequent behaviour of legislators, preferences at the level of the individual legislator have been almost entirely neglected in the study of parliaments and legislative behaviour. The book measures these using an until now under-utilized resource: parliamentary surveys. Building on these, the book develops measures of policy incentives of legislators to dissent from their parliamentary parties, and show that preference similarity amongst legislators explains a very substantial proportion of party unity, yet alone cannot explain all of it. Analysing the attitudes of legislators to the demands of party unity, and what drives these attitudes, the book argues that what explains the observed unity (beyond what preference similarity would explain) is the conscious acceptance by MPs that the long-term benefits of belonging to a united party (such as increased influence on legislation, lower transaction costs, and better chances of gaining office) outweigh the short-terms benefits of always voting for their ideal policy outcome. The book buttresses this argument through the analysis of both open-ended survey questions as well as survey questions on the costs and benefits of belonging to a political party in a legislature.

How Lives Change

2018 ◽  
Author(s):  
Himanshu ◽  
Peter Lanjouw ◽  
Nicholas Stern
Keyword(s):  
Green Revolution ◽  
Critical Role ◽  
Uttar Pradesh ◽  
North India ◽  
Land Reforms ◽  
Key Drivers ◽  
Growth And Change ◽  
Development Outcomes ◽  
The Village

Development economics is about understanding how and why lives and livelihoods change. This book is about economic development in the village of Palanpur, in Moradabad district, Uttar Pradesh, in north India. It draws on seven decades of detailed data collection by a team of dedicated development economists to describe the evolution of Palanpur’s economy, its society, and its politics. The emerging story of integration of the village economy with the outside world is placed against the backdrop of a rapidly transforming India and, in turn, helps to understand the transformation. The role of, and scope for, public policy in shaping the lives of individuals is examined. The book describes how changes in Palanpur’s economy since the late 1950s were initially driven by the advance of agriculture through land reforms, the expansion of irrigation, and the introduction of ‘green revolution’ technologies. Then, since the mid-1980s, newly emerging off-farm opportunities in nearby towns and outside agriculture became the key drivers of growth and change. These key forces of change have profoundly influenced poverty, income mobility, and inequality in Palanpur. Village institutions such as those governing access to land are shown to have evolved in subtle but clear ways over time, while individual entrepreneurship and initiative is found to play a critical role in driving and responding to the forces of change. And yet, against a backdrop of real economic growth and structural transformation, the book documents how human development outcomes have shown only weak progress and remain stubbornly resistant to change.

scholarly journals Global dynamics of international migration systems across South–South, North–North, and North–South flows, 1990–2015

2021 ◽  
Vol 6 (1) ◽  
Author(s):  
Diego F. Leal ◽  
Nicolas L. Harder
Keyword(s):  
International Migration ◽  
Network Effects ◽  
Global Dynamics ◽  
Core Set ◽  
Migration Dynamics ◽  
Key Drivers ◽  
Migration Flows ◽  
And Migration ◽  
Migration Systems

AbstractEvidence from 184 countries over the span of 25 years is gathered and analyzed to understand North–North, South–South, and North–South international migration flows. Conceptually, the analysis borrows from network theory and Migration Systems Theory (MST) to develop a model to characterize the structure and evolution of international migration flows. Methodologically, the Stochastic Actor-oriented Model of network dynamics is used to jointly model the three types of flows under analysis. Results show that endogenous network effects at the monadic, dyadic, and triadic levels of analysis are relevant to understand the emergence and evolution of migration flows. The findings also show that a core set of non-network covariates, suggested by MST as key drivers of migration flows, does not always explain migration dynamics in the systems under analysis in a consistent fashion; thus, suggesting the existence of important levels of heterogeneity inherent to these three types of flows. Finally, evidence related to the role of political instability and countries’ care deficits is also discussed as part of the analysis. Overall, the results highlight the importance of analyzing flows across the globe beyond typically studied migratory corridors (e.g., North–South flows) or regions (e.g., Europe).

scholarly journals The role of mergers and interactions in driving the evolution of dwarf galaxies over cosmic time

2020 ◽  
Vol 500 (4) ◽  
pp. 4937-4957 ◽  
Author(s):  
G Martin ◽  
R A Jackson ◽  
S Kaviraj ◽  
H Choi ◽  
J E G Devriendt ◽  
...  
Keyword(s):  
Star Formation ◽  
Dwarf Galaxies ◽  
Large Fraction ◽  
Structural Evolution ◽  
Cosmic Time ◽  
Stellar Mass ◽  
High Mass ◽  
Key Drivers ◽  
Mass Assembly

ABSTRACT Dwarf galaxies (M⋆ &lt; 109 M⊙) are key drivers of mass assembly in high-mass galaxies, but relatively little is understood about the assembly of dwarf galaxies themselves. Using the NewHorizon cosmological simulation (∼40 pc spatial resolution), we investigate how mergers and fly-bys drive the mass assembly and structural evolution of around 1000 field and group dwarfs up to z = 0.5. We find that, while dwarf galaxies often exhibit disturbed morphologies (5 and 20 per cent are disturbed at z = 1 and z = 3 respectively), only a small proportion of the morphological disturbances seen in dwarf galaxies are driven by mergers at any redshift (for 109 M⊙, mergers drive under 20 per cent morphological disturbances). They are instead primarily the result of interactions that do not end in a merger (e.g. fly-bys). Given the large fraction of apparently morphologically disturbed dwarf galaxies which are not, in fact, merging, this finding is particularly important to future studies identifying dwarf mergers and post-mergers morphologically at intermediate and high redshifts. Dwarfs typically undergo one major and one minor merger between z = 5 and z = 0.5, accounting for 10 per cent of their total stellar mass. Mergers can also drive moderate star formation enhancements at lower redshifts (3 or 4 times at z = 1), but this accounts for only a few per cent of stellar mass in the dwarf regime given their infrequency. Non-merger interactions drive significantly smaller star formation enhancements (around two times), but their preponderance relative to mergers means they account for around 10 per cent of stellar mass formed in the dwarf regime.

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