17,130 research outputs found
Learning Curve and Wind Power
This study explores the reasons why countries have chosen subsidies to green electricity instead of implementing the more common Pigouvian tax on polluting emissions. I focus on the learning by doing effects from the production of wind power on the cost of future production as a justification for the observed policies. In doing so, I present two models that differ in the way I introduce learning. Under reasonable parameter values, the price paid to a firm for the energy produced from wind power is heterogeneous, and varies among the firms that produce energy from wind power according to the index of productivity of the firm itself. The suggested strategies of this research differ from the main price-driven schemes adopted by EU members; by comparing such results with European Union policy, the paper show that EU policy is not optimal.learning by doing, environmental policy, Pigouvian taxes, subsidies.
An equivariant isomorphism theorem for mod reductions of arboreal Galois representations
Let be a quadratic, monic polynomial with coefficients in , where is a localization of a number ring
. In this paper, we first prove that if is non-square and
non-isotrivial, then there exists an absolute, effective constant with
the following property: for all primes
such that the reduced polynomial is non-square and non-isotrivial, the squarefree
Zsigmondy set of is bounded by . Using this
result, we prove that if is non-isotrivial and geometrically stable then
outside a finite, effective set of primes of the geometric
part of the arboreal representation of is isomorphic to
that of . As an application of our results we prove R. Jones' conjecture
on the arboreal Galois representation attached to the polynomial .Comment: Comments are welcome
Eisenstein Polynomials over Function Fields
In this paper we compute the density of monic and non-monic Eisenstein
polynomials of fixed degree having entries in an integrally closed subring of a
function field over a finite field
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