39 research outputs found
The economic and ecological effects of water management choices in the upper Niger river: Development of decision support methods
One million people in the Inner Niger Delta make a living from arable farming, fisheries and livestock. Upstream dams (one built for electricity generation and one for irrigation) affect this downstream multifunctional use of water. Additionally, the Inner Niger Delta, which is one of the largest Ramsar sites in the world, is a hotspot of biodiversity and accommodates two of the largest known breeding colonies of large wading birds in Africa and in addition, is a vital part of the eco-regional network, supporting up to 3 to 4 million staging waterbirds, residents and migrants from all over Europe and western Asia. The hydrological and related ecological conditions in the Inner Delta largely determine the population size of these waterbird species. The major aim of the three-year study was to develop a decision-support system for river management in the Upper Niger, in which ecological and socio-economical impacts and benefits of dams and irrigation systems can be analysed in relation to different water management scenarios. The study involves various components: hydrology, arable farming, livestock, fisheries, ecology and socio-economics. An economic analysis has been conducted to determine the role of dams in the economy of the Inner Niger Delta and the Upper Niger region. By innovatively combining the above information on hydrology, ecology, fisheries, and agriculture, the study shows that building new dams is not an efficient way to increase economic growth and reduce poverty in the region. In fact, such efforts are counter-effective. Instead, development efforts should be aimed at improving the efficiency of the existing infrastructure, as well as of current economic activities in the Inner Niger Delta itself. This approach will also provide greater certainty for the essential eco-regional network functioning of the Inner Delta. © 2006 Taylor & Francis
Potential impact of invasive alien species on ecosystem services provided by a tropical forested ecosystem: a case study from Montserrat
Local stakeholders at the important but
vulnerable Centre Hills on Montserrat consider that
the continued presence of feral livestock (particularly
goats and pigs) may lead to widespread replacement of
the reserve’s native vegetation by invasive alien trees
(Java plum and guava), and consequent negative
impacts on native animal species. Since 2009, a
hunting programme to control the feral livestock has
been in operation. However long-term funding is not
assured. Here, we estimate the effect of feral livestock
control on ecosystem services provided by the forest to
evaluate whether the biodiversity conservation rationale
for continuation of the control programme is
supported by an economic case. A new practical tool
(Toolkit for Ecosystem Service Site-based Assessment)
was employed to measure and compare ecosystem
service provision between two states of the
reserve (i.e. presence and absence of feral livestock
control) to estimate the net consequences of the
hunting programme on ecosystem services provided
by the forest. Based on this we estimate that cessation
of feral livestock management would substantially
reduce the net benefits provided by the site, including a
46 % reduction in nature-based tourism (from
228,000) and 36 % reduction in harvested
wild meat (from 132,000). The
overall net benefit generated from annual ecosystem
service flows associated with livestock control in thereserve, minus the management cost, was $214,000
per year. We conclude that continued feral livestock
control is important for maintaining the current level
of ecosystem services provided by the reserve
"A convenient truth": air travel passengers' willingness to pay to offset their CO2 emissions
Several economic reviews demonstrate the substantial costs related to climate
change and consequently call for early action. These reviews, however, have been limited
to measuring ‘objective’ risks and expected material damage related to climate change. The
‘subjective’ perceived risk of climate change and society’s willingness to pay (WTP) to
avoid these risks are expected to provide an important additional motivation for direct
action. We investigate whether and why air travel passengers—an increasingly important
source of greenhouse gas emissions—are supportive of measures that increase the cost of
their travel based on the polluter pays principle and compensate the damage caused by their
flight. Compared to the results of the few previous studies that have elicited WTP estimates
for climate policy more generally, our results appear to be at the lower end of the scale,
while a comparison to estimates of the social cost of carbon shows that the average WTP
estimate in this study is close to the estimated marginal damage cost. Although significant
differences are found between travellers from Europe, North America, Asia and the rest of
the world, we show that there exists a substantial demand for climate change mitigation
action. The positive risk premium over and above the expected property damage cost
assessments should be accounted for more explicitly in economic reviews as it will add to
the burden of proof of direct action. Measurements of passenger WTP will help policy
makers to design effective financial instruments aimed at discouraging climate-unfriendly
travel activities as well as to generate funds for the measures directed at climate change
mitigation and adaptation. Based on stated WTP by travellers to offset their greenhouse gas
emissions, funds in the order of magnitude of €23 billion could be generated annually to
finance climate change mitigation activities
Effect of COVID-19 lockdown on maternity care and maternal outcome in the Netherlands: a national quasi-experimental study
Objectives: The COVID-19 pandemic and associated lockdowns disrupted health care worldwide. High-income countries observed a decrease in preterm births during lockdowns, but maternal pregnancy–related outcomes were also likely affected. This study investigates the effect of the first COVID-19 lockdown (March–June 2020) on provision of maternity care and maternal pregnancy–related outcomes in the Netherlands. Study design: National quasi-experimental study. Methods: Multiple linked national registries were used, and all births from a gestational age of 24+0 weeks in 2010–2020 were included. In births starting in midwife-led primary care, we assessed the effect of lockdown on provision of care. In the general pregnant population, the impact on characteristics of labour and maternal morbidity was assessed. A difference-in-regression-discontinuity design was used to derive causal estimates for the year 2020. Results: A total of 1,039,728 births were included. During the lockdown, births to women who started labour in midwife-led primary care (49%) more often ended at home (27% pre-lockdown, +10% [95% confidence interval: +7%, +13%]). A small decrease was seen in referrals towards obstetrician-led care during labour (46%, −3% [−5%,−0%]). In the overall group, no significant change was seen in induction of labour (27%, +1% [−1%, +3%]). We found no significant changes in the incidence of emergency caesarean section (9%, −1% [−2%, +0%]), obstetric anal sphincter injury (2%, +0% [−0%, +1%]), episiotomy (21%, −0% [−2%, +1%]), or post-partum haemorrhage: >1000 ml (6%, −0% [−1%, +1%]). Conclusions: During the first COVID-19 lockdown in the Netherlands, a substantial increase in homebirths was seen. There was no evidence for changed available maternal outcomes, suggesting that a maternity care system with a strong midwife-led primary care system may flexibly and safely adapt to external disruptions
A Kuznets curve for recycling
The paper aims at extending the debate on Environmental Kuznets Curves to the case of non-renewable resources and to discuss the driving forces that might give rise to EKC's in this case. The paper at hand deviates from the standard EKC analysis in two ways: First, mostly EKC's are analyzed for flow variables. In this paper we argue that EKC's may very well arise for certain stock variables like minerals or waste. Second, most papers that provide a theoretical foundation for EKC's focus on assumptions like technological anomalies (e.g. increasing returns) or technological switches. We offer an alternative explanation by showing that EKC's might arise simply due to the combination of recycling and the rising scarcity of materials. It is shown that an EKC for non-renewables might emerge during the transition to the long-run balanced growth path. Whether or not an EKC arises depends e.g. on initial conditions, but also on preferences and technology. The assumptions made about the ability of recycling firms to internalize the interrelation between recycling decisions today and the future availability of recyclable waste matter with respect to the prerequisites for an EKC and the speed of convergence. Internalization furthermore implies that an economy can be caught in a poverty trap, i.e. it might not be able to converge to the long-run growth equilibrium if the initial endowment with resources and capital is too low