100 research outputs found
sj-docx-1-han-10.1177_15589447231220412 – Supplemental material for Greening Hand Surgery: Targeted Measures to Reduce Waste in Ambulatory Trigger Finger and Carpal Tunnel Decompression
No full textSupplemental material, sj-docx-1-han-10.1177_15589447231220412 for Greening Hand Surgery: Targeted Measures to Reduce Waste in Ambulatory Trigger Finger and Carpal Tunnel Decompression by Ruth Tevlin, Jasmine A. Panton and Paige M. Fox in HAND</p
Modelling Investment When Relative Prices Are Trending: Theory and Evidence for the UK
No full textThis paper investigates the ability of aggregate and disaggregate equations to account for the boom in UK plant and machinery investment in the second half of the 1990s. We extend previous US research by Tevlin and Whelan (2002) by explaining the failure of the aggregate equations more formally in terms of misspecification when relative prices are trending; and by conducting the econometric analysis in a formal cointegration framework. In line with the US research, we find asset-level equations can explain the UK investment boom over this period, whereas the aggregate equation completely fails.investment, computers, relative prices
Permutation statistics related to a class of noncommutative symmetric functions and generalizations of the Genocchi numbers
No full textInternational audienceWe prove conjectures of the third author [L. Tevlin, Proc. FPSAC'07, Tianjin] on two new bases of noncommutative symmetric functions: the transition matrices from the ribbon basis have nonnegative integral coefficients. This is done by means of two composition-valued statistics on permutations and packed words, which generalize the combinatorics of Genocchi numbers
The effects of firm success on foreign direct investment, CEO compensation, and wages : issues on monitoring costs and simultaneity
No full textThesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Economics, 1995.Includes bibliographical references.by Stacey Marie Tevlin.Ph.D
The 2001 recession: how was it different and what developments may have caused it?
No full textThe 2001 recession was unique in several respects. For instance, the peak-to-trough decline in real gross domestic product was one of the smallest on record and its duration was slightly shorter than average. This article examines some of the other unique features of the 2001 recession compared with the “average” post-World War II recession. The author also shows that forecasters were surprised by the onset of the recession, perhaps because of incomplete data available to them in real time. Finally, the article examines the errors from a well-known macroeconomic forecast and finds that forecasters were surprised by the declines in real business and household fixed investment, as well as real net exports, before the March 2001 business cycle peak.Recessions ; Economic indicators ; Business cycles
Infrared subtraction at next-to-next-to-leading order for gluonic initial states
No full textIn this thesis we describe a procedure for isolating the infrared singularities present in gluonic scattering amplitudes at
next-to-leading and next-to-next-to-leading order. We adopted the
antenna subtraction framework which has been successfully applied to the
calculation of NNLO corrections to the 3-jet cross section and related
event shape distributions in electron-positron annihilation. We consider
processes with coloured particles in the initial state, and in
particular two-jet production in hadron-hadron collisions at
accelerators such as the Large Hadron Collider (LHC). We derive explicit
formulae for subtracting the single and double unresolved contributions
from the double radiation gluonic processes using
antenna functions with initial state partons. We show numerically that
the subtraction term effectively approximates the matrix element in the
various single and double unresolved configurations
Econometric Issues in Estimating User Cost Elasticity
No full textThe user cost elasticity is a parameter of considerable importance in economics, with implications for the effects of budget deficits, tax-based savings incentives, monetary policy, corporate taxes, and tariffs and quotas on capital goods. This paper analyzes the econometric issues that account for differences in the estimated elasticity between the two existing papers that estimate the long-run elasticity on aggregate data. The preferred estimate that results from this analysis is substantially higher than most previous estimates. The empirical evidence suggests that, when adjustment frictions are important, long-run estimates of key parameters are less biased – and the details of the econometrics matter. In particular, DOLS estimates appear less biased than the alternatives considered here. The econometric issues that are analyzed in this paper have wide-ranging implications for research areas where adjustment frictions are important, including nominal price stickiness, habit formation, and sticky information models, among others.User cost elasticity, Capital stock, Investment, Adjustment frictions, Cointegration and long-run econometrics
Soil–atmosphere exchange of ammonia in a non-fertilized grassland: measured emission potentials and inferred fluxes
No full textA 50-day field study was carried out in a semi-natural, non-fertilized
grassland in south-western Ontario, Canada during the late summer and early
autumn of 2012. The purpose was to explore surface–atmosphere exchange
processes of ammonia (NH3) with a focus on bi-directional fluxes
between the soil and atmosphere. Measurements of soil pH and ammonium
concentration ([NH4+]) yielded the first direct quantification of
soil emission potential (Γsoil = [NH4+]/[H+])
for this land type, with values ranging from 35 to 1850 (an average of
290). The soil compensation point, the atmospheric NH3 mixing ratio
below which net emission from the soil will occur, exhibited both a seasonal
trend and diurnal trend. Higher daytime and August compensation points were
attributed to higher soil temperature. Soil–atmosphere fluxes were estimated
using NH3 measurements from the Ambient Ion Monitor Ion Chromatograph
(AIM-IC) and a simple resistance model. Vegetative effects were ignored
due to the short canopy height and significant Γsoil. Inferred
fluxes were, on average, 2.6 ± 4.5 ng m−2 s−1 in August
(i.e. net emission) and −5.8 ± 3.0 ng m−2 s−1 in September
(i.e. net deposition). These results are in good agreement with the only
other bi-directional exchange study in a semi-natural, non-fertilized
grassland. A Lagrangian dispersion model (Hybrid Single-Particle Lagrangian Integrated Trajectory – HYSPLIT) was used to calculate air
parcel back-trajectories throughout the campaign and revealed that NH3
mixing ratios had no directional bias throughout the campaign, unlike the
other atmospheric constituents measured. This implies that soil–atmosphere
exchange over a non-fertilized grassland can significantly moderate
near-surface NH3 concentrations. In addition, we provide indirect
evidence that dew and fog evaporation can cause a morning increase of
[NH3]g. Implications of our findings on current NH3
bi-directional exchange modelling efforts are also discussed
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