6,877 research outputs found
The employment impact of business investment incentives in declining areas: an evaluation of the EU “Objective 2 Area” programs.
Beginning in 1989, the European Union started targeting its Structural Funds business incentives geographically to industrial areas that have been facing above average unemployment and industrial job loss. Although billions of euros have been invested in these Objective 2 areas, very little is known about the effectiveness of these public expenditures. This paper develops an estimation strategy utilizing parametric difference in difference specifications to estimate the impact of business incentives offered in the Objective 2 areas of central and northern Italy between 1995 and 1998. The paper finds the incentives to be most effective in the areas that faced the least pre-intervention employment loss.Urban and regional economic development; impact evaluation; employment policy; Structural Funds
A comparative evaluation of spacially targeted economic revitalization programs in the European Union and the United States.
This paper compares and contrasts the United States federal Empowerment Zone and European Union Objective 2 programs that geographically target economic revitalization incentives. Since 1989, both programs have designated predominately industrial or urban areas as being distressed and worthy of government incentives in three separate rounds. The paper uses a probit econometric model to comparatively evaluate the characteristics of the areas that were targeted. The paper finds that while the programs were fashioned for different reasons and thus had different goals, the programs on both continents initially targeted very distressed areas. However, consistent with the fears of critics of spatial targeting, subsequent rounds of designation greatly expanded the programs, and in most cases, lead to less precise targeting.
Nonparametric Bayes Modeling of Populations of Networks
Replicated network data are increasingly available in many research fields.
In connectomic applications, inter-connections among brain regions are
collected for each patient under study, motivating statistical models which can
flexibly characterize the probabilistic generative mechanism underlying these
network-valued data. Available models for a single network are not designed
specifically for inference on the entire probability mass function of a
network-valued random variable and therefore lack flexibility in characterizing
the distribution of relevant topological structures. We propose a flexible
Bayesian nonparametric approach for modeling the population distribution of
network-valued data. The joint distribution of the edges is defined via a
mixture model which reduces dimensionality and efficiently incorporates network
information within each mixture component by leveraging latent space
representations. The formulation leads to an efficient Gibbs sampler and
provides simple and coherent strategies for inference and goodness-of-fit
assessments. We provide theoretical results on the flexibility of our model and
illustrate improved performance --- compared to state-of-the-art models --- in
simulations and application to human brain networks
Post-T Tauri stars: a false problem
We consider the problem of the apparent lack of old T Tauri stars in low-mass
star forming regions in the framework of the standard model of low-mass star
formation. We argue that the similarity between molecular cloud lifetime and
ambipolar diffusion timescale implies that star formation does not take place
instantaneously, nor at a constant rate. We conclude that the probability of
finding a large population of old stars in a star forming region is
intrinsically very small and that the post-T Tauri problem is by and large not
existent.Comment: 6 pages (LaTeX), no Figures to be published in The Astrophysical
Journal Letter
Electromagnetic Productions of KLambda and KSigma on the Nucleons
We briefly review the progress and problems in the electromagnetic production
of KLambda on the nucleon. The problem of the data discrepancy in this channel
as well as the corresponding physics consequence are highlighted. We also
discuss the effect of the new beam-recoil polarization data Cx and Cz on our
analysis. For this purpose we use the isobar model Kaon-Maid and a recent
multipoles model that can describe recent experimental data. We also present a
new multipoles model for the KSigma channels to complete our analysis.Comment: 8 pages, 6 figures, invited talk at 6th International Conference on
Perspectives in Hadronic Physics, Trieste, Italy, 12-16 May 200
Revisiting cosmological bounds on radiative neutrino lifetime
Neutrino oscillation experiments and direct bounds on absolute masses
constrain neutrino mass differences to fall into the microwave energy range,
for most of the allowed parameter space. As a consequence of these recent
phenomenological advances, older constraints on radiative neutrino decays based
on diffuse background radiations and assuming strongly hierarchical masses in
the eV range are now outdated. We thus derive new bounds on the radiative
neutrino lifetime using the high precision cosmic microwave background spectral
data collected by the Far Infrared Absolute Spectrophotometer instrument on
board of Cosmic Background Explorer. The lower bound on the lifetime is between
a few x 10^19 s and 5 x 10^20 s, depending on the neutrino mass ordering and on
the absolute mass scale. However, due to phase space limitations, the upper
bound in terms of the effective magnetic moment mediating the decay is not
better than ~ 10^-8 Bohr magnetons. We also comment about possible improvements
of these limits, by means of recent diffuse infrared photon background data. We
compare these bounds with pre-existing limits coming from laboratory or
astrophysical arguments. We emphasize the complementarity of our results with
others available in the literature.Comment: 7 pages, 3 figures. Minor changes in the text, few references added.
Matches the published versio
Guide to Geographical Indications: Linking Products and Their Origins (Summary)
Geographical Indications present significant opportunities for differentiating products or services that are uniquely related to their geographic origin. While they can offer many positive economic, social, cultural, and even environmental benefits, they can also be problematic and therefore caution is warranted when pursuing them. The publication distills the relevant lessons that could apply, particularly to developing countries, from a review of more than 200 documents and a number of original Case Studies. It presents a groundwork to better understand the costs and the benefits of undertaking Geographical Indications by outlining the basic processes, covering the pros and cons of different legal instruments, and offering insights into the important factors of success. It reviews and presents current data on the key issues of global GIs such as: economic results, public and private benefits; and market relevance.Geographical Indications, developing country, marketing, local, traditional, culture, appellation, legal protection, Denomination of Origin
Relativistic Quark-Model Results for Baryon Ground and Resonant States
Latest results from a study of baryon ground and resonant states within
relativistic constituent quark models are reported. After recalling some
typical spectral properties, the description of ground states, especially with
regard to the nucleon and hyperon electromagnetic structures, is addressed. In
the following, recent covariant predictions for pion, eta, and kaon partial
decay widths of light and strange baryon resonances below 2 GeV are summarized.
These results exhibit a characteristic pattern that is distinct from
nonrelativistic or relativized decay studies performed so far. Together with a
detailed analysis of the spin, flavor, and spatial structures of the wave
functions, it supports a new and extended classification scheme of baryon
ground and resonant states into SU(3) flavor multiplets
Pressure and isotope effect on the anisotropy of MgB
We analyze the data for the pressure and boron isotope effect on the
temperature dependence of the magnetization near . Invoking the
universal scaling relation for the magnetization at fixed magnetic field it is
shown that the relative shift of , induced by pressure or boron isotope
exchange, mirrors essentially that of the anisotropy. This uncovers a novel
generic property of anisotropic type II superconductors, inexistent in the
isotropic case. For MgB it implies that the renormalization of the Fermi
surface topology due to pressure or isotope exchange is dominated by a
mechanism controlling the anisotropy.Comment: 7 pages, 3 figure
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