2,085 research outputs found
THE USE OF A MARSHALLIAN MACROECONOMIC MODEL FOR POLICY EVALUATION: CASE OF SOUTH AFRICA
Using a disaggregated Marshallian Macroeconomic Model (MMM-DA), this paper investigates how the adoption of a set of 'free market reforms' may affect the economic growth rate of South Africa. Accounting for possible side effects mainly on the budget deficit, our findings suggest that the institution of the proposed policy reforms would yield a substantial growth in the aggregate annual real GDP. The resulting GDP growth rate could range from 5.3 percent to 9.8 percent depending on which variant of the reform policies is implemented.Marshallian Macroeconometric Model, Disaggregation, Transfer functions
The Use of a Marshallian Macroeconomic Model for Policy Evaluation: Case of South Africa
Using a disaggregated Marshallian Macroeconomic Model (MMM-DA), this paper investigates how the adoption of a set of 'free market reforms' may affect the economic growth rate of South Africa. Accounting for possible side effects mainly on the budget deficit, our findings suggest that the institution of the proposed policy reforms would yield a substantial growth in the aggregate annual real GDP. The resulting GDP growth rate could range from 5.3 percent to 9.8 percent depending on which variant of the reform policies is implemented.Marshallian Macroeconometric Model; Disaggregation; Transfer functions.
Quantum theory of spontaneous and stimulated emission of surface plasmons
We introduce a quantization scheme that can be applied to surface waves
propagating along a plane interface. An important result is the derivation of
the energy of the surface wave for dispersive non-lossy media without invoking
any specific model for the dielectric constant. Working in Coulomb's gauge, we
use a modal representation of the fields. Each mode can be associated with a
quantum harmonic oscillator. We have applied the formalism to derive
quantum-mechanically the spontaneous emission rate of surface plasmon by a
two-level system. The result is in very good agreement with Green's tensor
approach in the non-lossy case. Green's approach allows also to account for
losses, so that the limitations of a quantum approach of surface plasmons are
clearly defined. Finally, the issue of stimulated versus spontaneous emission
has been addressed. Because of the increasing density of states near the
asymptote of the dispersion relation, it is quantitatively shown that the
stimulated emission probability is too small to obtain gain in this frequency
region.Comment: 14 pages, 5 figures, submitted to Phys. Rev. B
Asymptotic dynamics of thermal quantum fields
It is shown that the timelike asymptotic properties of thermal correlation
functions in relativistic quantum field theory can consistently be described in
terms of free fields carrying some stochastic degree of freedom which couples
to the thermal background. These ``asymptotic thermal fields'' have specific
algebraic properties (commutation relations) and their dynamics can be
expressed in terms of asymptotic field equations. The formalism is applied to
interacting theories where it yields concrete non-perturbative results for the
asymptotic thermal propagators. The results are consistent with the expected
features of dissipative propagation of the constitutents of thermal states,
outlined in previous work, and they shed new light on the non-perturbative
effects of thermal backgrounds.Comment: 23 pages, 2 figures; introduction extended, appendix on thermal
Green's functions added. Version as to appear in Nuclear Physics
Positivity bounds for Sivers functions
We generalize a positivity constraint derived initially for parity-conserving
processes to the parity-violating ones, and use it to derive non-trivial bounds
on several Sivers functions, entering in the theoretical description of single
spin asymmetry for various processes.Comment: 6 pages, version to appear in PL
The use of a Marshallian macroeconomic model for policy evaluation : case of South Africa
Using a disaggregated Marshallian macroeconomic model, this paper investigates how the
adoption of a set of “free market reforms” may affect the economic growth rate of South
Africa. Our findings suggest that the institution of the proposed policy reforms would
yield substantial growth in aggregate annual real GDP. The resulting annual GDP growth
rate could range from 5.3% to 9.8%, depending on which variant of the reform policies
was implemented.http://journals.cambridge.org/MD
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