Supply-Side Policies and the Zero Lower Bound

This paper examines how supply-side policies may play a role in fighting a low aggregate demand that traps an economy at the zero lower bound (ZLB) of nominal interest rates. Future increases in productivity or reductions in mark-ups triggered by supply-side policies generate a wealth effect that pulls current consumption and output up. Since the economy is at the ZLB, increases in the interest rates do not undo this wealth effect, as we will have in the case outside the ZLB. We illustrate this mechanism with a simple two-period New Keynesian model. We discuss possible objections to this set of policies and the relation of supply-side policies with more conventional monetary and fiscal policies.

On the η\eta and η′\eta' Photoproduction Beam Asymmetry at High Energies

We show that, in the Regge limit, beam asymmetries in $\eta$ and $\eta'$ photoproduction are sensitive to hidden strangeness components. Under reasonable assumptions about the couplings we estimate the contribution of the $\phi$ Regge pole, which is expected to be the dominant hidden strangeness contribution. The ratio of the asymmetries in $\eta'$ and $\eta$ production is estimated to be close to unity in the forward region $0 < -t/\text{GeV}^2 \leq 1$ at the photon energy $E_\text{lab} = 9$~GeV, relevant for the upcoming measurements at Jefferson Lab.Comment: 9 pages, 4 figure

Netflix in Web of Science: a bibliometric approach

Netflix has shaken up audiovisual industry, but what about academic research? This bibliometric analysis focuses on 210 papers indexed in Web of Science that address this issue. We examine the author, university of affiliation, language, journal, keywords, year of publication, citations received, and categories covered in WoS. We also conducted a quantitative analysis of abstracts and papers to identify the most recurrent methodologies, themes, and samples. Our results highlight a rise in Netflix studies in recent years and their tendency to analyse specific audiovisual works. There are many qualitative analysis of specific Netflix hits, but none of the shows particularly stands out. It also shows a rise in “Communication” and “Film, Radio & Television” papers (40% of them), although academic interest relies on Netflix corporate culture, business, and algorithm. These studies are mainly carried out using a qualitative methodology (83%). More than half of the articles focus on one of the Netflix series and, among them, the greatest interest lies in the representation of specific issues; gender, race and sexuality are present in 25% of the works in the sample (n=210). At the same time, among the 367 authors signing these research papers, the parity between men (51%) and women (49%) is almost absolute. It appears that the geographical and linguistic variety of papers is related to Netflix’s global expansion and that the sheer number of titles covered reveals a fleeting attention due to Netflix’s trademark: swift and concentrated consumption.Netflix ha revolucionado la industria audiovisual, pero ¿y la investigación académica? Este análisis bibliométrico se centra en 210 artículos indexados en Web of Science que abordan esta cuestión. Examinamos el autor, la universidad de afiliación, el idioma, la revista, las palabras clave, el año de publicación, las citas recibidas y las categorías cubiertas en WoS. También realizamos un análisis cuantitativo de los resúmenes y los artículos para identificar las metodologías, los temas y las muestras más recurrentes. Se evidencia un aumento de los estudios sobre Netflix en los últimos años y una tendencia a analizar obras específicas (aunque ninguna destaca especialmente). También aumentan los trabajos sobre “Comunicación” y “Cine, Radio y Televisión” (40 %), aunque el interés académico se centra en la cultura corporativa, el negocio y el algoritmo de Netflix. Estos estudios se realizan principalmente con una metodología cualitativa (83 %). Más de la mitad de los artículos se centran en una de las series de Netflix y, entre ellos, el mayor interés radica en la representación de temas específicos; el género, la raza y la sexualidad están presentes en el 25 % de la muestra (n=210). Al mismo tiempo, entre los 367 autores, la paridad entre hombres (51 %) y mujeres (49 %) es casi absoluta. La variedad geográfica y lingüística de los trabajos responde a la expansión mundial de Netflix y el gran número de títulos tratados revela una atención fugaz debida a la propia identidad de marca de Netflix: su consumo rápido y concentrado

On the Equivalence of Three-Particle Scattering Formalisms

In recent years, different on-shell $\mathbf{3}\to\mathbf{3}$ scattering formalisms have been proposed to be applied to both lattice QCD and infinite volume scattering processes. We prove that the formulation in the infinite volume presented by Hansen and Sharpe in Phys.~Rev.~D92, 114509 (2015) and subsequently Brice\~no, Hansen, and Sharpe in Phys.~Rev.~D95, 074510 (2017) can be recovered from the $B$-matrix representation, derived on the basis of $S$-matrix unitarity, presented by Mai {\em et al.} in Eur.~Phys.~J.~A53, 177 (2017) and Jackura {\em et al.} in Eur.~Phys.~J.~C79, 56 (2019). Therefore, both formalisms in the infinite volume are equivalent and the physical content is identical. Additionally, the Faddeev equations are recovered in the non-relativistic limit of both representations.Comment: 13 pages, 5 figure

A Dynamic Kinetic Asymmetric Heck Reaction for the Simultaneous Generation of Central and Axial Chirality

A highly diastereo- and enantioselective, scalable Pd-catalyzed dynamic kinetic asymmetric Heck reaction of heterobiaryl sulfonates with electron-rich olefins is described. The coupling of 2,3-dihydrofuran or N-boc protected 2,3-dihydropyrrole with a variety of quinoline, quinazoline, phthalazine, and picoline derivatives takes place with simultaneous installation of central and axial chirality, reaching excellent diastereo- and enantiomeric excesses when in situ formed [Pd0/DM-BINAP] was used as the catalyst, with loadings reduced down to 2 mol % in large scale reactions. The coupling of acyclic, electron-rich alkenes can also be performed using a [Pd0/Josiphos ligand] to obtain axially chiral heterobiaryl α-substituted alkenes in high yields and enantioselectivities. Products from Boc-protected 2,3-dihydropyrrole can be easily transformed into N,N ligands or appealing axially chiral, bifunctional proline-type organocatalysts. Computational studies suggest that a β-hydride elimination is the stereocontrolling step, in agreement with the observed stereochemical outcome of the reaction.Ministerio de Ciencia e Innovación (Grants CTQ2016-76908-C2-1-P; CTQ2016-76908-C2-2-P; CTQ2016-78083-P; RYC-2013-12585)European Commission (FEDER Programme)Junta de Andalucía (Grant 2012/FQM 10787)Universidad de Sevilla (Grant No. 1800511201)European Union - Marie Skłodowska-Curie (COFUND—Grant Agreement nº 291780

Analyticity constraints for hadron amplitudes : going high to heal low energy issues

Analyticity constitutes a rigid constraint on hadron scattering amplitudes. This property is used to relate models in different energy regimes. Using meson photoproduction as a benchmark, we show how to test contemporary low-energy models directly against high-energy data. This method pinpoints deficiencies of the models and treads a path to further improvement. The implementation of this technique enables one to produce more stable and reliable partial waves for future use in hadron spectroscopy and new physics searches

Hints on the quadrupole deformation of the Δ\Delta(1232)

The E2/M1 ratio (EMR) of the $\Delta$(1232) is extracted from the world data in pion photoproduction by means of an Effective Lagrangian Approach (ELA).This quantity has been derived within a crossing symmetric, gauge invariant, and chiral symmetric Lagrangian model which also contains a consistent modern treatment of the $\Delta$(1232) resonance. The \textit{bare} s-channel $\Delta$(1232) contribution is well isolated and Final State Interactions (FSI) are effectively taken into account fulfilling Watson's theorem. The obtained EMR value, EMR$=(-1.30\pm0.52)$%, is in good agreement with the latest lattice QCD calculations [Phys. Rev. Lett. 94, 021601 (2005)] and disagrees with results of current quark model calculations.Comment: Enlarged conclusions and explanations on the E2/M1 ratio. Figure 3 improved. References updated. 5 pages. 3 figures. 2 tables. Accepted for publication in Physical Review

Automated Early Detection of Drops in Commercial Egg Production Using Neural Networks

[Abstract] 1. The purpose of this work was to support decision-making in poultry farms by performing automatic early detection of anomalies in egg production. 2. Unprocessed data were collected from a commercial egg farm on a daily basis over 7 years. Records from a total of 24 flocks, each with approximately 20 000 laying hens, were studied. 3. Other similar works have required a prior feature extraction by a poultry expert, and this method is dependent on time and expert knowledge. 4. The present approach reduces the dependency on time and expert knowledge because of the automatic selection of relevant features and the use of artificial neural networks capable of cost-sensitive learning. 5. The optimum configuration of features and parameters in the proposed model was evaluated on unseen test data obtained by a repeated cross-validation technique. 6. The accuracy, sensitivity, specificity and positive predictive value are presented and discussed at 5 forecasting intervals. The accuracy of the proposed model was 0.9896 for the day before a problem occurs.Galicia. Consellería de Cultura, Educación e Ordenación Universitaria; GRC2014/04