A primordial noble gas component discovered in the Ryugu asteroid and its implications.

Ryugu is the C-type asteroid from which material was brought to Earth by the Hayabusa2 mission. A number of individual grains and fine-grained samples analysed so far for noble gases have indicated that solar wind and planetary (known as P1) noble gases are present in Ryugu samples with concentrations higher than those observed in CIs, suggesting the former to be more primitive compared to the latter. Here we present results of analyses of three fine-grained samples from Ryugu, in one of which Xe concentration is an order of magnitude higher than determined so far in other samples from Ryugu.

How Do Carbon Taxes Affect Emissions? Plant-Level Evidence from Manufacturing.

This paper investigates how carbon taxes affect emissions by examining British Columbia's revenue-neutral carbon tax in the manufacturing sector. We theoretically demonstrate that carbon taxes can achieve emission reductions while increasing production. Recycling carbon tax revenues to lower corporate income tax rates encourages investments, allowing plants to emit less per unit of output.

Increment in the volcanic unrest and number of eruptions after the 2012 large earthquakes sequence in Central America.

Understanding the relationship cause/effect between tectonic earthquakes and volcanic eruptions is a striking topic in Earth Sciences. Volcanoes erupt with variable reaction times as a consequence of the impact of seismic waves (i.e.

Modeling count data for health care utilization: an empirical study of outpatient visits among Vietnamese older people.

Background: Vietnam is undergoing a fast-aging process that poses potential critical issues for older people and central among those is demand for healthcare utilization. However, healthcare utilization, here measured as count data, creates challenges for modeling because such data typically has distributions that are skewed with a large mass at zero. This study compares empirical econometric strategies for the modeling of healthcare utilization (measured as the number of outpatient visits in the last 12 months) and identifies the determinants of healthcare utilization among Vietnamese older people based on the best-fitting model identified.

Assessing Factors Associated with TB Awareness in Nepal: A National and Subnational Study.

Tuberculosis (TB) has still remained a serious global health threat in low- and middle-income countries in recent years. As of 2021, Nepal is one of the high TB burden countries, with an increasing prevalence of cases. This study evaluates factors associated with TB awareness in Nepal.

Novel Coronavirus Disease 2019 (COVID-19) and Cytokine Storms for More Effective Treatments from an Inflammatory Pathophysiology.

The Novel Coronavirus Disease 2019 (COVID-19) has swept the world and caused a global pandemic. SARS-CoV-2 seems to have originated from bats as their reservoir hosts over time. Similar to SARS-CoV, this new virus also exerts its action on the human angiotensin-converting enzyme 2.

The impact of COVID-19 on stock market performance in Africa: A Bayesian structural time series approach.

This paper evaluates and quantifies the short-term impact of the coronavirus disease of 2019 (COVID-19) on stock market performance in thirteen (13) African countries, using daily time series stock market data spanning 1st October 2019 to 30th June 2020. We employ a novel Bayesian structural time series approach (a state-space model) to estimate the relative effects of the COVID-19 pandemic on stock market performance in those countries. Generally, our Bayesian posterior estimates show that, in relative terms, stock market performances in Africa have significantly reduced during and after the occurrence of the COVID-19, usually between -2.

The impact of R&D and innovation on global supply chain transition: GTAP analysis on Japan's public R&D investment.

Policymaking for science, technology, and innovation (R&D) is stepping into a new era in the twenty-first century within a highly integrated production network, making it more challenging to capture the impact of R&D investment from an evidence-based approach. To unfold the paradox of the R&D spillover effect spared in the global supply chain, we use computable general equilibrium model with the GTAP database v10 to analyze the impact of Japan's public R&D investment to the world focus on key sectors of global supply chain, namely chemical and pharmaceutical, electronic equipment, machinery, and transportation equipment to examine its output, external trades, and welfare. The productivity parameters triggered by public R&D investment are calibrated from the SciREX Policymaking Intelligent Assistance System-Economic Simulator (SPIAS-e).

Covid-19 and Optimal Portfolio Selection for Investment in Sustainable Development Goals.

The Covid-19 pandemic and global economic recession has shrunk global energy demand and collapsed fossil fuel prices. Therefore, renewable energy projects are losing their competitiveness. This endangers the achievement of several Sustainable Development Goals (SDGs) and the Paris Agreement on Climate Change.

Is the Price System or Rationing More Effective in Getting a Mask to Those Who Need It Most?

Weitzman's classic insight on the virtues of allocating a scarce good via the price system or through rationing is applied to the problem of distributing masks, when the use of a mask provides a positive external benefit. I show that if a market leaves some individuals without a mask (when potentially there is supply for all), then rationing may be the superior option. When the variation in need is small, then even if the external effect of mask wearing is approximately equal to the personal benefit, even 10-20% maskless in the population may justify rationing.

Ethnic Violence and Birth Outcomes: Evidence From Exposure to the 1992 Conflict in Kenya.

This study is an examination of the effect of intrauterine exposure to electoral violence on child birth weight, an outcome that has long-term effects on an individual's education, income, and health in later life. We consider the electoral violence that resulted from the introduction of multiparty democracy in Kenya as an exogenous source of shock, using a difference-in-differences method and a mother fixed-effects model. We find that prenatal exposure to the violence increased the probabilities of low birth weight and a child being of very small size at birth by 19 and 6 percentage points, respectively.

Decomposing gender inequality in functional disability among older people in Vietnam.

Objectives: This study compared functional disability in older men and women, and examined the extent to which social determinants contribute to the difference in functional disability between Vietnamese older men and women.

Methods: A nationally representative sample of persons aged 60 and older in Vietnam, taken from the 2011 Vietnam Aging Survey, was analyzed (N = 2,693, consisting of 1,622 women and 1,071 men). Ordinary least squares regression (OLS) was used to identify factors associated with functional disability in men and women, while Oaxaca-Blinder decomposition for linear models was applied to examine how much of gender inequality in functional disability was attributed by the distribution of the social determinants.

Farmers' risk preferences and rice production: Experimental and panel data evidence from Uganda.

Although rice has been a prominent cash crop in areas with access to lowland in Uganda, the adoption of rice and area expansion have stagnated despite the Government of Uganda's 2009 National Rice Development Policy and its commitment to doubling rice production over 10 years. Using panel data collected in 2010 and 2017 as well as risk preference data elicited via lab-in-the-field experiments conducted in rural Uganda, we find that farmers with higher loss aversion are less likely to grow rice and expand their rice cultivation areas. This study affirms that risk preferences play a critical role in agricultural production decisions.

Evaluating anthropogenic and environmental tritium effects using precipitation and Hokkaido snowpack at selected coastal locations in Asia.

Tritium dating requires a good understanding of the tritium and water inputs into hydrologic systems, including their main trends due to latitudinal, seasonal and altitudinal effects. Although tritium reached ambient levels at the end of the 20th century, tritium released from nuclear facilities and bomb tests since then has the potential to confound use of tritium for age dating. We therefore collected precipitation and snowpack samples for tritium analysis to confirm that tritium levels in Japanese precipitation had not exceeded ambient levels following the North Korean nuclear tests in January 6th 2016 and September 3rd 2017.

SPACIA1/SAAL1 Deletion Results in a Moderate Delay in Collagen-Induced Arthritis Activity, along with mRNA Decay of Gene.

This study was performed to elucidate the molecular function of the synoviocyte proliferation-associated in collagen-induced arthritis (CIA) 1/serum amyloid A-like 1 (SPACIA1/SAAL1) in mice CIA, an animal model of rheumatoid arthritis (RA), and human RA-synovial fibroblasts (RASFs). -deficient mice were generated and used to create mouse models of CIA in mild or severe disease conditions. Cell cycle-related genes, whose expression levels were affected by small interfering RNA (siRNA), were screened.

The development of universal health insurance coverage in Thailand: Challenges of population aging and informal economy.

This paper quantitatively investigates the sustainability of the universal health insurance coverage (UHI) system in Thailand while taking into account the country's rapidly aging population and large informal labor sector. We examine the effects of population aging and informal employment across three tax options for financing the UHI. A modern dynamic general equilibrium framework is utilized to conduct policy experiments and welfare analysis.

Price offers of pharmaceutical procurement in China: evidence from Guangdong province.

Using a sample from the pharmaceutical procurement in Guangdong, China, over the period from 2007-2009 and a data set of comprehensive potential bidders, this article analyzes the determinants of bidding behaviors in the presence of sample selection. Bidding patterns between highly competitive and less competitive groups are also examined. Price differentials are further decomposed to explain factors that account for the gap.

Socio-economic determinants of mortality in Taiwan: combining individual and aggregate data.

There is a very large literature that examines the relationship between health and income. Two main hypotheses have been investigated: the income inequality hypothesis and the absolute income hypothesis. Most of previous studies that used mortality data have been criticized for estimating an aggregate model that does not account for non-linear links between health and income at the individual level.