498 research outputs found
Do Corporate Control and Product Market Competition Lead to Stronger Productivity Growth? Evidence from Market-Oriented and Blockholder-Based Governance Regimes
This study investigates the impact of corporate governance and product market competition on total factor productivity growth for two large samples of German and UK firms. In poorly performing UK firms, the presence of strong outside blockholders lead to substantial increases in productivity. Contrarily, for German poorly performing and distressed firms, it is bank debt concentration which stimulates productivity growth. Whereas high bank debt concentration also supports productivity growth in German profitable firms, leverage is unrelated to productivity growth in UK firms. Weak product market competition in the UK has a negative impact on productivity growth of in both widely-held firms and concentrated firms with the exception of firms controlled insiders (directors). These seem able to generate productivity increases in firms subject to little market discipline. For profitable German firms, the relation between strong blockholder control and productivity growth is limited. Only control by banks, insurance firms and the government can somewhat reduce the negative effect of weak product market competition.corporate governance;productivity growth;ownership and control;product market competition;financial distress
Do Corporate Control and Product Market Competition Lead to Stronger Productivity Growth? Evidence from Market-Oriented and Blockholder-Based Governance Regimes
This study investigates the impact of corporate governance and product market competition on total factor productivity growth for two large samples of German and UK firms. In poorly performing UK firms, the presence of strong outside blockholders lead to substantial increases in productivity. Contrarily, for German poorly performing and distressed firms, it is bank debt concentration which stimulates productivity growth. Whereas high bank debt concentration also supports productivity growth in German profitable firms, leverage is unrelated to productivity growth in UK firms. Weak product market competition in the UK has a negative impact on productivity growth of in both widely-held firms and concentrated firms with the exception of firms controlled insiders (directors). These seem able to generate productivity increases in firms subject to little market discipline. For profitable German firms, the relation between strong blockholder control and productivity growth is limited. Only control by banks, insurance firms and the government can somewhat reduce the negative effect of weak product market competition.
Phase retrieval via regularization in self-diffraction based spectral interferometry
A novel variant of spectral phase interferometry for direct electric-field
reconstruction (SPIDER) is introduced and experimentally demonstrated. Other
than most previously demonstrated variants of SPIDER, our method is based on a
third-order nonlinear optical effect, namely self-diffraction, rather than the
second-order effect of sum-frequency generation. On one hand, self-diffraction
(SD) substantially simplifies phase-matching capabilities for multi-octave
spectra that cannot be hosted by second-order processes, given manufacturing
limitations of crystal lengths in the few-micrometer range. On the other hand,
however, SD SPIDER imposes an additional constraint as it effectively measures
the spectral phase of a self-convolved spectrum rather than immediately
measuring the fundamental phase. Reconstruction of the latter from the measured
phase and the spectral amplitude of the fundamental turns out to be an
ill-posed problem, which we address by a regularization approach. We discuss
the numerical implementation in detail and apply it to measured data from a
Ti:sapphire amplifier system. Our experimental demonstration used 40-fs pulses
and a 500 m thick BaF crystal to show that the SD SPIDER signal is
sufficiently strong to be separable from stray light. Extrapolating these
measurements to the thinnest conceivable nonlinear media, we predict that
bandwidths well above two optical octaves can be measured by a suitably adapted
SD SPIDER apparatus, enabling the direct characterization of pulses down to
single-femtosecond pulse durations. Such characteristics appear out of range
for any currently established pulse measurement technique
HoloNets: Spectral Convolutions do extend to Directed Graphs
Within the graph learning community, conventional wisdom dictates that
spectral convolutional networks may only be deployed on undirected graphs: Only
there could the existence of a well-defined graph Fourier transform be
guaranteed, so that information may be translated between spatial- and spectral
domains. Here we show this traditional reliance on the graph Fourier transform
to be superfluous and -- making use of certain advanced tools from complex
analysis and spectral theory -- extend spectral convolutions to directed
graphs. We provide a frequency-response interpretation of newly developed
filters, investigate the influence of the basis used to express filters and
discuss the interplay with characteristic operators on which networks are
based. In order to thoroughly test the developed theory, we conduct experiments
in real world settings, showcasing that directed spectral convolutional
networks provide new state of the art results for heterophilic node
classification on many datasets and -- as opposed to baselines -- may be
rendered stable to resolution-scale varying topological perturbations.Comment: arXiv admin note: text overlap with arXiv:2310.0043
F14RS SGR No. 37 (LSU Mobile App)
A RESOLUTION
To urge and request LSU Information Technologies to redesign the LSU Mobile ap
Ricardo ZorraquĂn BecĂș (1911-2000)
Ricardo Zorraquín Becú is considered one of the greatest Latin-American historians of Legal History. The present document pretends to review some of the aspects of his life –as a professor and investigator– and his connection with the magazine “Revista del Instituto de Historia del Derecho Ricardo Levene”. In turn, we pretend to give an original but brief perspective of his relationship with Alamiro de Ávila Martel and the magazine “Revista Chilena de Historia del Derecho”.Ricardo Zorraquín Becú es considerado uno de los historiadores del derecho latinoamericano más influyentes. El presente trabajo pretende revisar algunas de las facetas de su vida como la de docente e investigador y su vinculación con la Revista del Instituto de Historia del Derecho Ricardo Levene. A su vez, pretendemos entregar una perspectiva si bien escueta novedosa sobre su relación con Alamiro de Ávila Martel y la Revista Chilena de Historia del Derecho
Verbs in mothersâ input to six-month-olds:synchrony between presentation, meaning, and actions is related to later verb acquisition
In embodied theories on language, it is widely accepted that experience in acting generates an expectation of this action when hearing the word for it. However, how this expectation emerges during language acquisition is still not well understood. Assuming that the intermodal presentation of information facilitates perception, prior research had suggested that early in infancy, mothers perform their actions in temporal synchrony with language. Further research revealed that this synchrony is a form of multimodal responsive behavior related to the childâs later language development. Expanding on these findings, this article explores the relationship between actionâlanguage synchrony and the acquisition of verbs. Using qualitative and quantitative methods, we analyzed the coordination of verbs and action in mothersâ input to six-month-old infants and related these maternal strategies to the infantsâ later production of verbs. We found that the verbs used by mothers in these early interactions were tightly coordinated with the ongoing action and very frequently responsive to infant actions. It is concluded that use of these multimodal strategies could significantly predict the number of spoken verbs in infantsâ vocabulary at 24 months
- âŠ