5,290 research outputs found
Switching Reconstruction of Digraphs
Switching about a vertex in a digraph means to reverse the direction of every
edge incident with that vertex. Bondy and Mercier introduced the problem of
whether a digraph can be reconstructed up to isomorphism from the multiset of
isomorphism types of digraphs obtained by switching about each vertex. Since
the largest known non-reconstructible oriented graphs have 8 vertices, it is
natural to ask whether there are any larger non-reconstructible graphs. In this
paper we continue the investigation of this question. We find that there are
exactly 44 non-reconstructible oriented graphs whose underlying undirected
graphs have maximum degree at most 2. We also determine the full set of
switching-stable oriented graphs, which are those graphs for which all
switchings return a digraph isomorphic to the original
The incidence of nominal and real wage rigidities in Great Britain: 1978–1998
This paper analyzes the extent of rigidities in wage setting in Great Britain over the 1980s and 1990s. Our estimation strategy, which generalizes the work of Altonji and Devereux (2000), models the notional wage growth distribution--the distribution of nominal wage growth that would occur in the absence of rigidities in pay--while allowing for the presence of measurement error in the data. The model then allows for the possibility that the nominal wage growth of a fraction of the workforce may be subject to a nominal or real downward rigidity. Our model suggests that real rigidities in wage setting are more prevalent than nominal rigidities, although the incidence of these real wage rigidities has fallen gradually over time. If firms cannot cut real wages in response to negative demand shocks they may resort to laying off workers. Our results support this microfoundation of the wage-unemployment Phillips curve: Workers who are more likely to be protected from wage cuts are also more likely to lose their jobs.Wages - Great Britain
The energy tax: who pays?
An examination of the problems that arise when the government attempts to formulate economic policies having multiple objectives--in this case, reducing the nation's energy consumption and its associated social costs while ensuring that no particular region or income group bears a disproportionate share of the burden.Power resources ; Taxation
Does wage inflation cause price inflation?
Is there any evidence to support the assumption that increased wages cause inflation? This study updates and expands earlier research into this question and finds little support for the view that higher wages cause higher prices. On the contrary, more evidence is found for higher prices leading to wage growth.Inflation (Finance) ; Wages ; Prices
Thermal Transient Multisource Simulation Using Cubic Spline Interpolation of Zth Functions
This paper presents a very straightforward method to compute the transient
thermal response to arbitrary power dissipation profiles in electronic devices
with multiple heat sources. Using cubic spline interpolation of simulated or
measured unit power step response curves (Zth-functions), additional errors due
to model reduction can be avoided. No effort has to be spent on the generation
of compact models. The simple analytic form of the interpolating splines can be
exploited to evaluate the convolution integral of the Zth-functions with
arbitrary power profiles at low computational costs. An implementation of the
algorithm in a spreadsheet program (EXCEL) is demonstrated. The results are in
very good agreement with temperature profiles computed by transient Finite
Element simulation but can be obtained in a fraction of the time.Comment: Submitted on behalf of TIMA Editions
(http://irevues.inist.fr/tima-editions
Monte Carlo Simulation of Deffuant opinion dynamics with quality differences
In this work the consequences of different opinion qualities in the Deffuant
model were examined. If these qualities are randomly distributed, no different
behavior was observed. In contrast to that, systematically assigned qualities
had strong effects to the final opinion distribution. There was a high
probability that the strongest opinion was one with a high quality.
Furthermore, under the same conditions, this major opinion was much stronger
than in the models without systematic differences. Finally, a society with
systematic quality differences needed more tolerance to form a complete
consensus than one without or with unsystematic ones.Comment: 8 pages including 5 space-consuming figures, fir Int. J. Mod. Phys. C
15/1
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