8 Works

Self-determination theory: A theoretical framework for group supervision with internal coaches

Alan Wingrove, Yi-Ling Lai, Stephen Palmer & Stephen Williams

Term Structure Transmission of Monetary Policy

Sharon Kozicki & P.A. Tinsley
Under bond-rate transmission of monetary policy, the authors show that a generalized Taylor Principle applies, in which the average anticipated path of policy responses to inflation is subject to a lower bound of unity. This result helps explain how bond rates may exhibit stable responses to inflation, even in periods of passive policy. Another possible explanation is time-varying term premiums with risk pricing that depends on inflation. The authors present a no-arbitrage model of the...

Teno Valley Seismic Network

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A network of 6 Guralp 6TD and 6 Guralp ESP seismometers deployed for 20 months around the Teno and Tinguiririca Valleys in the Chilean Andes.

Perhaps the FOMC Did What It Said It Did: An Alternative Interpretation of the Great Inflation

Kozicki Sharon & P.A. Tinsley
This paper uses real-time briefing forecasts prepared for the Federal Open Market Committee (FOMC) to provide estimates of historical changes in the design of U.S. monetary policy and in the implied central-bank target for inflation. Empirical results support a description of policy with an effective inflation target of roughly 7 percent in the 1970s. Moreover, the evidence suggests that mismeasurement of the degree of economic slack was largely irrelevant for explaining the Great Inflation while...

Zircon U-Pb Sediment provenance data for Miocene to recent sediments collected at Site U1521 during International Ocean Discovery Programme (IODP) Expedition 374 to the Ross Sea, Antarctica

Pieter Vermeesch, Andy Carter & James Marschalek
This dataset comprises zircon U-Pb data on 11 samples, each containing ~90-150 individual grains. This method was applied to sediment samples from IODP Expedition 374 Site U1521 to the Ross Sea, collected on the RV JOIDES Resolution. Shipboard biostratigraphy and magnetostratigraphy suggests the samples are mainly early Miocene in age (McKay et al., 2019). The uppermost samples do, however, include younger Plio-Pleistocene sediments. Samples were measured using an Agilent 7900 laser ablation inductively-coupled plasma mass...

Data from: Sporadic sampling not climatic forcing drives observed early hominin diversity

Simon J. Maxwell, Philip J. Hopley, Paul Upchurch & Christophe Soligo
The role of climate change in the origin and diversification of early hominins is hotly debated. Most accounts of early hominin evolution link observed fluctuations in species diversity to directional shifts in climate or periods of intense climatic instability. None of these hypotheses, however, have tested whether observed diversity patterns are distorted by variation in the quality of the hominin fossil record. Here, we present a detailed examination of early hominin diversity dynamics, including both...

Data from: The first skeletal record of the enigmatic Cretaceous sawfish genus Ptychotrygon (Chondrichthyes, Batoidea) from the Turonian of Morocco

Eduardo Villalobos-Segura, Charlie Underwood & David Ward
A new fossil batoid (ray) Ptychotrygon rostrispatula sp. nov. is described from five exceptionally well-preserved, three-dimensional skeletal remains from the Turonian (Late Cretaceous) of Morocco. These specimens represent the first known skeletal remains for the genus Ptychotrygon and allow an almost complete description of the genus providing a new insight to its phylogenetic relations and validate its taxonomic status as a member of the Sclerorhynchoidei. Mechanical preparation of the fossil remains revealed a relatively large...

Data from: Learning to see the wood for the trees: machine learning, decision trees and the classification of isolated theropod teeth

Simon Wills, Charlie J. Underwood & Paul M. Barrett
Taxonomic identification of fossils based on morphometric data traditionally relies on the use of standard linear models to classify such data. Machine learning and decision trees offer powerful alternative approaches to this problem but are not widely used in palaeontology. Here, we apply these techniques to published morphometric data of isolated theropod teeth in order to explore their utility in tackling taxonomic problems. We chose two published datasets consisting of 886 teeth from 14 taxa...

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