scholarly journals The Market Stabilization Role of Central Bank Asset Purchases: High-Frequency Evidence from the COVID-19 Crisis

2020 ◽  
Author(s):  
Marco Bernardini ◽  
Annalisa De Nicola
Keyword(s):  
Central Bank ◽  
High Frequency ◽  
Asset Purchases ◽  
Market Stabilization

scholarly journals Empowering Central Bank Asset Purchases: The Role of Financial Policies

2019 ◽  
Author(s):  
Matthieu Darracq Paries ◽  
Jenny Körner ◽  
Niki Papadopoulou
Keyword(s):  
Central Bank ◽  
Financial Policies ◽  
Asset Purchases

scholarly journals Deconstructing Monetary Policy Surprises— The Role of Information Shocks

2020 ◽  
Vol 12 (2) ◽  
pp. 1-43 ◽  
Author(s):  
Marek Jarociński ◽  
Peter Karadi
Keyword(s):  
Monetary Policy ◽  
Central Bank ◽  
Interest Rates ◽  
Stock Prices ◽  
High Frequency ◽  
Structural Vector Autoregression ◽  
Role Of Information ◽  
Structural Vector ◽  
Economic Outlook

Central bank announcements simultaneously convey information about monetary policy and the central bank's assessment of the economic outlook. This paper disentangles these two components and studies their effect on the economy using a structural vector autoregression. It relies on the information inherent in high-frequency co-movement of interest rates and stock prices around policy announcements: a surprise policy tightening raises interest rates and reduces stock prices, while the complementary positive central bank information shock raises both. These two shocks have intuitive and very different effects on the economy. Ignoring the central bank information shocks biases the inference on monetary policy nonneutrality. (JEL D83, E43, E44, E52, E58, G14)

Calculation-and-experimental estimation of the role of the frequency ratio in changing the endurance at two-frequency deformation modes

2019 ◽  
Vol 85 (1(I)) ◽  
pp. 64-71 ◽  
Author(s):  
M. M. Gadenin
Keyword(s):  
High Frequency ◽  
Experimental Studies ◽  
Low Frequency ◽  
Reduction Factor ◽  
Single Frequency ◽  
Cyclic Loads ◽  
Small Ratio ◽  
Harmonic Components ◽  
Deformation Modes

The cycle configuration at two-frequency loading regimes depends on the number of parameters including the absolute values of the frequencies and amplitudes of the low-frequency and high-frequency loads added during this mode, the ratio of their frequencies and amplitudes, as well as the phase shift between these harmonic components, the latter having a significant effect only with a small ratio of frequencies. Presence of such two-frequency regimes or service loading conditions for parts of machines and structures schematized by them can significantly reduce their endurance. Using the results of experimental studies of changes in the endurance of a two-frequency loading of specimens of cyclically stable, cyclically softened and cyclically hardened steels under rigid conditions we have shown that decrease in the endurance under the aforementioned conditions depends on the ratio of frequencies and amplitudes of operation low-frequency low-cycle and high-frequency vibration stresses, and, moreover, the higher the level of the ratios of amplitudes and frequencies of those stacked harmonic processes of loading the greater the effect. It is shown that estimation of such a decrease in the endurance compared to a single frequency loading equal in the total stress (strains) amplitudes can be carried out using an exponential expression coupling those endurances through a parameter (reduction factor) containing the ratio of frequencies and amplitudes of operation cyclic loads and characteristic of the material. The reduction is illustrated by a set of calculation-experimental curves on the corresponding diagrams for each of the considered types of materials and compared with the experimental data.

Who moved the Market? Analyzing the role of Central Bank speeches

2020 ◽  
Author(s):  
Abhinav Anand ◽  
Sankarshan Basu ◽  
Jalaj Pathak ◽  
Ashok Thampy
Keyword(s):  
Central Bank

scholarly journals Money Decentralization under Direct Democracy Procedures. The Case of Classical Athens

2021 ◽  
Vol 14 (1) ◽  
pp. 30
Author(s):  
Emmanouil-Marios L. Economou ◽  
Nicholas C. Kyriazis ◽  
Nikolaos A. Kyriazis
Keyword(s):  
Monetary Policy ◽  
Central Bank ◽  
Direct Democracy ◽  
Hellenistic Period ◽  
International Currency ◽  
Monetary System ◽  
Mediterranean World ◽  
The Stability ◽  
City State

By analyzing the case of Athens during the Classical period (508-323 BCE) the main thesis of this paper is that under direct democracy procedures and the related institutional setup, a monetary system without a Central Bank may function relatively well. We focus on the following issues: (i) Τhe procedures of currency issuing in the Athenian city-state, (ii) why the Athenian drachma become the leading international currency in the Mediterranean world (iii) how and towards which targets monetary policy without a Central Bank was possible (iv) defining the targets of monetary policy and the mechanisms for its implementation (v) the role of money in the economy (vi) the issue of deficit spending (vii) the reasons of the replacement of the Athenian drachma as a leading currency by others from the Hellenistic period onwards (viii) the correlation of our findings regarding the decentralized character of monetary policy in Classical Athens to today’s realities, such as the issue of cryptocurrencies. Our analysis shows that monetary policy without a Central Bank was possible, with its foremost aim being the stability of the currency (mainly, silver coins) in order to enhance trust in it and so, make it an international currency which could outcompete other currencies. Since there was no Central Bank like today, monetary policy decisions were taken by the popular assembly of citizens in combination with the market forces themselves.

scholarly journals How Can We Manage Gallbladder Lesions by Transabdominal Ultrasound?

Diagnostics ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 784
Author(s):  
Shinji Okaniwa
Keyword(s):  
High Frequency ◽  
Layer Structure ◽  
Wall Layer ◽  
Pancreaticobiliary Maljunction ◽  
Doppler Imaging ◽  
Wall Thickening ◽  
Contrast Enhanced ◽  
Postural Changes ◽  
Venous Phase

The most important role of ultrasound (US) in the management of gallbladder (GB) lesions is to detect lesions earlier and differentiate them from GB carcinoma (GBC). To avoid overlooking lesions, postural changes and high-frequency transducers with magnified images should be employed. GB lesions are divided into polypoid lesions (GPLs) and wall thickening (GWT). For GPLs, classification into pedunculated and sessile types should be done first. This classification is useful not only for the differential diagnosis but also for the depth diagnosis, as pedunculated carcinomas are confined to the mucosa. Both rapid GB wall blood flow (GWBF) and the irregularity of color signal patterns on Doppler imaging, and heterogeneous enhancement in the venous phase on contrast-enhanced ultrasound (CEUS) suggest GBC. Since GWT occurs in various conditions, subdividing into diffuse and focal forms is important. Unlike diffuse GWT, focal GWT is specific for GB and has a higher incidence of GBC. The discontinuity and irregularity of the innermost hyperechoic layer and irregular or disrupted GB wall layer structure suggest GBC. Rapid GWBF is also useful for the diagnosis of wall-thickened type GBC and pancreaticobiliary maljunction. Detailed B-mode evaluation using high-frequency transducers, combined with Doppler imaging and CEUS, enables a more accurate diagnosis.

Parasites in Antarctic krill guts inferred from DNA sequences

2019 ◽  
Vol 31 (1) ◽  
pp. 16-22 ◽  
Author(s):  
Alison C. Cleary ◽  
Maria C. Casas ◽  
Edward G. Durbin ◽  
Jaime Gómez-Gutiérrez
Keyword(s):  
Dna Sequences ◽  
High Frequency ◽  
Dna Analysis ◽  
Antarctic Krill ◽  
Euphausia Superba ◽  
Gut Contents ◽  
The West ◽  
West Antarctic ◽  
Wide Range

AbstractThe keystone role of Antarctic krill,Euphausia superbaDana, in Southern Ocean ecosystems, means it is essential to understand the factors controlling their abundance and secondary production. One such factor that remains poorly known is the role of parasites. A recent study of krill diet using DNA analysis of gut contents provided a snapshot of the parasites present within 170E. superbaguts in a small area along the West Antarctic Peninsula. These parasites includedMetschnikowiaspp. fungi,Haptoglossasp. peronosporomycetes,LankesteriaandParalecudinaspp. apicomplexa,Stegophorussp. nematodes, andPseudocolliniaspp. ciliates. Of these parasites,Metschnikowiaspp. fungi andPseudocolliniaspp. ciliates had previously been observed inE. superba, as had other genera of apicomplexans, though notLankesteriaandParalecudina.In contrast, nematodes had previously only been observed in eggs ofE. superba, and there are no literature reports of peronosporomycetes in euphausiids.Pseudocolliniaspp., parasitoids which obligately kill their host, were the most frequently observed infection, with a prevalence of 12%. The wide range of observed parasites and the relatively high frequency of infections suggest parasites may play a more important role than previously acknowledged inE. superbaecology and population dynamics.

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