Relative Importance Of Different Channels Research Articles

How the media matters for the economic vote: Evidence from Britain

Existing research finds that economic news can influence how citizens evaluate their governments, but the relative importance of different channels through which this effect arises, and how this may vary across contexts, remains unclear. Drawing on media dependency theory, I argue that we should observe larger media effects on citizens’ economic evaluations during periods of economic stability than during crises. Moreover, during crises, we should observe larger media effects on citizens’ evaluations of governing parties’ responsibility for, and handling of, the economic situation, than on their subjective economic evaluations. Additionally, these effects should be stronger among governing party supporters. Analysis of British public opinion leading up to and following the 2007–8 global financial crisis provides empirical support for this theory. These findings have implications for our understanding of how the media matters for the economic vote, as well as voters’ ability to use elections as instruments of accountability during crises.

Understanding How Socioeconomic Inequalities Drive Inequalities in COVID-19 Infections

Background: Across the world, the COVID-19 pandemic has disproportionately affected economically disadvantaged groups. This differential impact has numerous possible explanations, each with significantly different policy implications. We examine, for the first time in a low- or middle-income country, which mechanisms best explain the disproportionate impact of the virus on the poor.Methods: We use primary data from the CoVIDA project, including the results of 59,770 RT-PCR tests in Bogota´, targeted on a mostly asymptomatic adult population June 2020 to March 3rd, 2021. This is combined with administrative data that covers all reported cases in Bogota´. We estimate a number of parameters that are likely to drive inequality in COVID-19 infection rates across socioeconomic groups, then use these estimates in an individual-level branching process model of the epidemic. We use counterfactual scenarios to estimate the relative importance of different channels for explaining inequality in infection rates.Findings: Total infections and inequalities in infections are largely driven by inequalities in the ability to work remotely and in within-home secondary attack rates. Inequalities in isolation behavior are less important but non-negligible, while access to testing and contract-tracing plays practically no role. Interventions that mitigate transmission are found to be more effective when targeted on socioeconomically disadvantaged groups.Interpretation: Socioeconomically disadvantaged groups are particularly vulnerable to COVID-19 infections, and this appears to be driven by the need to work out of home, and higher transmission within home. Policies that can successfully reduce these channels of transmission among the poor are likely to have large benefits.Funding: The authors acknowledge generous support from the Interamerican Development Bank, the Development Bank of Latin America (CAF), the University of Los Andes and the Universidad Nacional de Colombia. Duncan Webb gratefully acknowledges support from the ED 465 at University Paris 1, and the EUR project ANR-17-EURE-0001.Declaration of Interest: The authors have no competing interests to declare.Ethical Approval: Ethics approval was obtained from the ethics committee of Universidad de los Andes (Act number 1278 of 2020). The ethics committee approved that the participants would receive the information via telephone and give their verbal consent, in order to comply with physical distancing and limit the restriction for a study is part of a public health surveillance strategy implemented jointly with the Health Secretary of Bogota.

Stable isotopes of amino acids indicate that soil decomposer microarthropods predominantly feed on saprotrophic fungi

AbstractSoil microarthropods are essential for nutrient cycling in forest ecosystems as they are integral components of decomposer food webs. They channel carbon and nutrients from leaf litter and roots to higher trophic levels; however, knowledge on the relative importance of different channels and on their variation with forest type is lacking. Although the importance of root‐derived inputs for sustaining soil food webs is increasingly recognized, the pathways by which they are channeled to higher trophic levels are little understood. For the channeling, ectomycorrhizal fungi may play a significant role, but until now methods allowing to separate the contribution of ectomycorrhizal and saprotrophic fungi to the nutrition of soil animal communities are lacking. Using dual analysis of 15N and 13C in amino acids (AAs), we investigated trophic positions and basal resources of two major groups of soil microarthropods, Collembola and Oribatida, in beech and spruce forests in Germany. By applying a 13C fingerprinting approach and Bayesian mixing models, we separated in a first step the relative contribution of bacteria, fungi, and plants to the nutrition of soil microarthropods. As fungi were identified as the major food source, in a second step we attempted to separate the contribution of ectomycorrhizal vs. saprotrophic fungi. For the first time, we provide direct evidence that soil microarthropods mainly rely on saprotrophic fungi, whereas ectomycorrhizal fungi are consumed by only few species. While trophic niches of Collembola and Oribatida species generally varied little between beech and spruce forests, plant detritus as basal resource of soil microarthropods was somewhat more important in beech forests, whereas in spruce forests microbial resources dominated. Overall, the dual analysis of carbon and nitrogen in AAs provided insight into food web structure of soil microarthropods in unprecedented detail, and for the first time allowed to estimate the relative importance of mycorrhizal and saprotrophic fungi for soil food web nutrition, a long‐standing riddle in soil food web ecology. The technique provides the perspective for a comprehensive understanding of the trophic structure and energy channeling in soil food webs.

Travel Behavior, Energy Use, and Carbon Emissions: Evidence from Shenzhen, China

In many developing and emerging economies, rapid income growth and changing demographics is leading to heightened demand for energy-intensive urban transportation. This study provides a comprehensive empirical framework for analyzing how income, age, and education influence individual energy use and carbon emissions through multiple dimensions of travel behavior, including number of trips, trip distance, transportation mode choice, vehicle ownership, and fuel economy of cars. Analyzing travel diary survey data collected by the authors in Shenzhen in 2014, we find that energy consumption and carbon emissions increase almost proportionally to income, and that older age and more education increase energy use and carbon emissions substantially, with the relative importance of different channels varying by factor.

The Role of Different Channels in Transmitting Monetary Policy into Output and Price in Vietnam

The paper investigates the mechanism of monetary transmission in Vietnam through different channels - namely the interest rate channel, the exchange rate channel, the asset channel and the credit channel for the period January 1995 - October 2009. This study applies VAR analysis to evaluate the monetary transmission mechanisms to output and price level. To compare the relative importance of different channels for transmitting monetary policy, the paper estimates the impulse response functions and variance decompositions of variables. The empirical results show that the changes in money supply have a significant impact on output rather than price in the short run. The impacts of money supply on price and output are stronger through the exchange rate and credit channels, but however, are weaker through the interest rate channel. The impacts of monetary policy on output and inflation may be erroneous through the equity price channel because of the lack of an established and well-functioning stock market.

Monetary Transmission in India: An Evaluation

This paper studies the monetary transmission mechanism in India for the period 2004 April to 2015 March. It examines the relative importance of different channels of monetary transmission viz, interest, credit, asset price and exchange rate channel respectively. The study employs a series of VAR models to gain insight into how a change in the policy rate affects output and the price level. The importance of each of the channels is gauged by first taking the relevant channel variable as endogenous and then taking it as an exogenous variable in the VAR models to block off all interactions between the channel variable and all other endogenous variables. The results indicate the importance of the interest channel, credit channel and the asset price channel. The exchange rate channel is found to be weak for the Indian economy during the estimation period.

Times, environments and channels of bulge formation in a Lambda cold dark matter cosmology

We analyze predictions from two independently developed galaxy formation models to study the mechanisms, environments, and characteristic times of bulge formation in a LambdaCDM cosmogony. For each model, we test different prescriptions for bulge formation in order to quantify the relative importance of different channels. Our results show that the strong correlation between galaxy and halo mass for central galaxies, and the richer merger history of more massive systems naturally give rise to a strong correlation between galaxy mass and morphology, and between halo mass and morphological type of central galaxies. Large fractions of the bulge mass are acquired through major and minor mergers, but disc instability plays an important role, particularly for intermediate mass galaxies. We find that the modelling of disc instability events, as well as of the galaxy merger times, can affect significantly the timing of bulge formation, and the relative importance of different channels. Bulge dominated galaxies acquire their morphology through major mergers, but this can be modified by cooling of gas from the surrounding hot halo. We find that disc regrowth is a non negligible component of the evolution of bulge dominated galaxies, particularly for low to intermediate masses, and at high redshifts.