Distortionary tax instruments and implementable monetary policy

We introduce distortionary taxes on consumption, labor and capital income into a New Keynesian model with Calvo pricing and nominal bonds. We study the relation between tax instruments and optimal monetary policy by computing simple rules for monetary and fiscal policy when one tax instrument at a time varies, while the other two are fixed at their steady-state level. The optimal rules maximize the second-order approximation to intertemporal utility. Three results emerge: (a) when prices are sticky, perfect inflation stabilization is optimal independently from the tax instrument adopted; (b) the optimal degree of responsiveness of monetary policy to output varies depending on which tax instrument induces fluctuations in the average tax rate; (c) when prices are flexible, fiscal rules that prescribe unexpected variations in the price level to support debt changes are always welfare-maximizing.

Exploring structure based charge transport relationships in phenyl diketopyrrolopyrrole single crystals using a 2D π–π dimer model system

This document is the Accepted Manuscript version of the following article: Jesus Calvo-Castro, and Callum J. McHugh, ‘Exploring structure based charge transport relationships in phenyl diketopyrrolopyrrole single crystals using a 2D π–π dimer model system’, Journal of Materials Chemistry C, Issue 16, 2017, first published 28 March 2017. The version of record is available online at DOI: http://dx.doi.org/10.1039/C7TC00434F © Royal Society of Chemistry 2017Crystalline phenyl diketopyrrolopyrroles are often overlooked as charge transfer mediating materials in optoelectronic applications. We report an experimentally ratified two dimensional π–π model dimer system dispelling previous misconceptions regarding the potential of these materials as organic semiconductors and that will enable researchers to screen and predict charge transport potential solely on the basis of their single crystal derived π-stacking architectures. In testing our model system versus the available database of phenyl diketopyrrolopyrrole single crystal structures we reveal that these materials are characterised by intrinsically large thermal integrities and in many cases large charge transfer integrals, not solely restricted to dimeric interactions exhibiting close intermonomer arrangements and bearing low torsion of the core phenyl rings. This study will be of significant interest to the increasingly large community engaged in the quest to engineer π-conjugated organic based semiconducting devices and particularly those employing crystalline diketopyrrolopyrroles.Peer reviewe

Experimental Observation of Coherence and Stochastic Resonances in an Electronic Chua Circuit

Stochastic and coherence resonances appear in nonlinear systems subjected to an external source of noise and are characterized by a maximum response at the optimal value of the noise intensity. This paper shows experimentally that it is possible to observe them in a chaotic system. To this end we have analysed an electronic Chua circuit running in the chaotic regime and added noise to its dynamics. In the case of coherence resonance, we observe an optimal periodicity for the jumps between chaotic attractors, whereas in the case of stochastic resonance we observe a maximum in the signal-to-noise ratio at the frequency of an external sinusoidal perturbation.Comment: 6 page

Galaxy Quenching from Cosmic Web Detachment

We propose the Cosmic Web Detachment (CWD) model, a framework to interpret the star-formation history of galaxies in a cosmological context. The CWD model unifies several starvation mechanisms known to disrupt or stop star formation into one single physical framework. Galaxies begin accreting star-forming gas at early times via a network of primordial filaments, simply related to the pattern of density fluctuations in the initial conditions. But when shell-crossing occurs on intergalactic scales, this pattern is disrupted, and the galaxy detaches from its primordial filaments, ending the accretion of cold gas. We argue that CWD encompasses known external processes halting star formation, such as harassment, strangulation and starvation. On top of these external processes, internal feedback processes such as AGN contribute to stop in star formation as well. By explicitly pointing out the non-linear nature of CWD events we introduce a simple formalism to identify CWD events in N-body simulations. With it we reproduce and explain, in the context of CWD, several observations including downsizing, the cosmic star formation rate history, the galaxy mass-color diagram and the dependence of the fraction of red galaxies with mass and local density.Comment: 20 pages, accepted for publication in OJA. High-res version: http://skysrv.pha.jhu.edu/~miguel/Papers/CWD/ms.pd

Cum iam fulua cinis fuero: sobre la estatura poética de C. Licinio Calvo

[spa] En el presente artículo pretendemos valorar la faceta poética de C. Licinio Calvo a través de los diferentes testimonios que nos ha legado la Antigüedad y de la comparación con otras figuras paralelas consideradas relevantes para entender su propia carrera poética, sin dejar de lado las aproximaciones anteriores de la crítica moderna. De todo ello concluimos que algunos autores antiguos que nos hablan de Calvo como poeta se remontan en última instancia a la información que ofrece Catulo en sus poemas y que su obra poética era más bien desconocida ya de antiguo. Una notable excepción parece ser su epilio, algunos de cuyos ecos encontramos en obras de primer orden, como las de Virgilio u Ovidio, y en el que marcó un camino propio respecto a las propuestas de Catulo, con el que siempre se le comparaba por su otra obra dedicada a Quintilia. [eng] The aim of this paper is to consider C. Licinius Calvus' poetic facet in view of ancient testimonies and the comparison with other parallel personalities in order to understand his own poetic career. Early approaches of modern criticism will be also taken into account. Our conclusion is that some ancient authors who allude to Calvus as a poet are indeed referring to Catullus' poems. Furthermore, his own poetic work was not very well-known in the old days. Nevertheless, his epyllion must be considered an exception because of its echoes in works such as those by Virgil and Ovid. It is precisely here where Calvus differed from Catullus' resolutions despite being frequently compared with him in his work devoted to Quintilia

Investment and trade patterns in a sticky-price, open-economy model

This paper develops a tractable two-country DSGE model with sticky prices à la Calvo (1983) and local-currency pricing. We analyze the capital investment decision in the presence of adjustment costs of two types, the capital adjustment cost (CAC) specification and the investment adjustment cost (IAC) specification. We compare the investment and trade patterns with adjustment costs against those of a model without adjustment costs and with (quasi-) flexible prices. We show that having adjustment costs results into more volatile consumption and net exports, and less volatile investment. We document three important facts on U.S. trade: a) the S-shaped cross-correlation function between real GDP and the real net exports share, b) the J-curve between terms of trade and net exports, and c) the weak and S-shaped cross-correlation between real GDP and terms of trade. We find that adding adjustment costs tends to reduce the model's ability to match these stylized facts. Nominal rigidities cannot account for these features either.Macroeconomics - Econometric models ; Capital investments ; International trade ; Foreign exchange

Concepts in Animal Parasitology, Part 3: Endoparasitic Platyhelminths

Part III: Endoparasitic Platyhelminths, chapters 15-47, pages 231-532, in Concepts in Animal Parasitology. 2024. Scott L. Gardner and Sue Ann Gardner, editors. Zea Books, Lincoln, Nebraska, United States; part III doi: 10.32873/unl.dc.ciap073 Platyhelminthes Chapter 15: Introduction to Endoparasitic Platyhelminths (Phylum Platyhelminthes) by Larry S. Roberts, John J. Janovy, Jr., Steve Nadler, and Scott L. Gardner, pages 231-240 Cestoda Chapter 16: Introduction to Cestodes (Class Cestoda) by Scott L. Gardner, pages 241-246 Eucestoda Chapter 17: Introduction to Cyclophyllidea Beneden in Braun, 1900 (Order) by Scott L. Gardner, pages 247-250 Chapter 18: Taenia (Genus) by Sumiya Ganzorig and Scott. L. Gardner, pages 251-261 Chapter 19: Echinococcus (Genus) by Akira Ito and Scott. L. Gardner, pages 262-275 Chapter 20: Proteocephalidae La Rue, 1911 (Family) by Tomáš Scholz and Roman Kuchta, pages 276-282 Chapter 21: Bothriocephalidea Kuchta et al., 2008 (Order) by Jorge Falcón-Ordaz and Luis García-Prieto, pages 283-288 Chapter 22: Diphyllobothriidea Kuchta et al., 2008 (Order): The Broad Tapeworms by Tomáš Scholz and Roman Kuchta, pages 289-296 Chapter 23: Trypanorhyncha Diesing, 1863 (Order) by Francisco Zaragoza-Tapia and Scott Monks, pages 297-305 Chapter 24: Cathetocephalidea Schmidt and Beveridge, 1990 (Order) by Luis García-Prieto, Omar Lagunas-Calvo, Brenda Atziri García-García, and Berenice Adán-Torres, pages 306-309 Chapter 25: Diphyllidea van Beneden in Carus, 1863 (Order) by Luis García-Prieto, Brenda Atziri García-García, Omar Lagunas-Calvo, and Berenice Adán-Torres, pages 310-315 Chapter 26: Lecanicephalidea Hyman, 1951 (Order) by Luis García-Prieto, Berenice Adán-Torres, Omar Lagunas-Calvo, and Brenda Atziri García- García, pages 316-320 Chapter 27: Litobothriidea Dailey, 1969 (Order) by Luis García-Prieto, Berenice Adán-Torres, Brenda Atziri García-García, and Omar Lagunas-Calvo, pages 321-325 Chapter 28: Phyllobothriidea Caira et al., 2014 (Order) by Brenda Atziri García-García, Omar Lagunas-Calvo, Berenice Adán-Torres, and Luis García-Prieto, pages 326-331 Chapter 29: Rhinebothriidea Healy et al., 2009 (Order) by Omar Lagunas-Calvo, Brenda Atziri García-García, Berenice Adán-Torres, and Luis García-Prieto, pages 332-339 Chapter 30: Relics of “Tetraphyllidea” van Beneden, 1850 (Order) by Berenice Adán-Torres, Omar Lagunas-Calvo, Brenda Atziri García-García, and Luis García-Prieto, pages 340-346 Amphilinidea Chapter 31: Amphilinidea Poche 1922 (Order) by Klaus Rohde, pages 347-353 Gyrocotylidea Chapter 32: Gyrocotylidea (Order): The Most Primitive Group of Tapeworms by Willi E. R. Xylander and Klaus Rohde, pages 354-360 Trematoda Aspidogastrea Chapter 33: Aspidogastrea (Subclass) by Klaus Rohde, pages 361-377 Digenea: Diplostomida Chapter 34: Introduction to Diplostomida Olson et al., 2003 (Order) by Lucrecia Acosta Soto, Bernard Fried, and Rafael Toledo, pages 378-393 Chapter 35: Aporocotylidae (Family): Fish Blood Flukes by Russell Q.-Y. Yong, pages 394-401 Digenea: Plagiorchiida Chapter 36: Introduction to Plagiorchiida La Rue, 1957 (Order) by Rafael Toledo, Bernard Fried, and Lucrecia Acosta Soto, pages 402-404 Chapter 37: Bivesiculata Olson et al., 2003 (Suborder): Small, Rare, but Important by Thomas H. Cribb and Scott C. Cutmore, pages 405-408 Chapter 38: Echinostomata La Rue, 1926 (Suborder) by Rafael Toledo, Bernard Fried, and Lucrecia Acosta Soto, pages 409-422 Chapter 39: Haplosplanchnata Olson et al., 2003 (Suborder): Two Hosts with Half the Guts by Daniel C. Huston, pages 423-427 Chapter 40: Hemiurata Skrjabin & Guschanskaja, 1954 (Suborder) by Lucrecia Acosta Soto, Bernard Fried, and Rafael Toledo, pages 428-435 Chapter 41: Monorchiata Olson et al., 2003 (Suborder): Two Families Separated by Salinity by Nicholas Q.-X. Wee, pages 436-442 Chapter 42: Opisthorchis (Genus) compiled from material from the United States Centers for Disease Control and Prevention, Division of Parasitic Diseases and Malaria by Sue Ann Gardner, pages 443-445 Xiphidiata Chapter 43: Allocreadiidae Looss, 1902 (Family) by Gerardo Pérez-Ponce de León, David Iván Hernández-Mena, and Brenda Solórzano-García, pages 446-459 Chapter 44: Haematoloechidae Odening, 1964 (Family) by Virginia León-Règagnon, pages 460-469 Chapter 45: Lecithodendriidae Lühe, 1901 (Family) by Jeffrey M. Lotz, pages 470-479 Chapter 46: Opecoelidae Ozaki, 1925 (Family): The Richest Trematode Family by Storm B. Martin, pages 480-489 Digenea Summary Chapter 47: Summary of the Digenea (Subclass): Insights and Lessons from a Prominent Parasitologist by Robin M. Overstreet, pages 490-53