How should we measure the return on public investment in a VAR?

A new method of empirically computing the macroeconomic returns to public investment is proposed. Pereira's (2000) technique is modified, and a measure which accounts for both public and private investment costs is suggested. An empirical application to US data shows that differences between alternative ways of measuring rates of return are non-trivial - taking into consideration the full investment effort halves estimated returns when partial public costs only are considered.

How should we monitor men receiving testosterone replacement therapy?

Monitor hematocrit and bone mineral density (BMD) (strength of recommendation [SOR]: B, meta-analysis of non−patient-oriented outcomes). Monitoring prostate-specific antigen (PSA), performing prostate digital rectal examination, and observing symptom response to testosterone are also recommended, although direct evidence is lacking (SOR: C, consensus opinion). Monitoring lipid levels is unnecessary (SOR: A, based on several meta-analyses), as is monitoring testosterone levels (SOR C, consensus opinion). Unless the patient is taking oral testosterone, no evidence exists for or against monitoring liver function (SOR: C, consensus opinion)

Current management of peripartum cardiomyopathy: A review

Background: Demarkis et al in 1971 described 27 patients who presented during pueperium with cardiomegaly, abnormal electrocardiographic findings, congestive heart failure and named the syndrome “peripartum cardiomyopathy”.The aim of this review is to document the current concepts in the management of peripartum cardiomyopathy.Materials and Methods: A search of the literature was done using PubMed,Goggle scholar and books from authors' collections.Results: The cause of the disease might be environmental and genetic factors. Diagnostic echocardiographic criteria include left ventricular ejection fraction of less than 45% or a combination of M- mode fractional shortening of less than 30% 2 and end diastolic dimension of greater than 2.7cm/m2 . Electrocardiogram, magnetic resonance imaging, endomyocardial biopsy and cardiac catheterization aid in the diagnosis and management of peripartum cardiomyopathy. Treatment includes both conventional pharcomological heart failure and peripartum cardiomyopathy targeted therapies.Therapeutic decisions are influenced by drug safety profiles during pregnancy and lactation. Mechanical support and transplantation might be necessary in severe cases.Conclusion: Peripartum cardiomyopathy is an uncommon but life threatening cardiac failure of unknown aetiology encountered in late pregnancy or postpartum period. Management aims at improving heart failure symptoms through conventional therapies and then at administering targeted therapies.The risk of recurrence in future pregnancies should always be considered.Keywords: Cardiomyopathy,Heart failure,Peripartu

Whitening of the Quark-Gluon Plasma

Parton-parton collisions do not neutralize local color charges in the quark-gluon plasma as they only redistribute the charges among momentum modes. We discuss color diffusion and color conductivity as the processes responsible for the neutralization of the plasma. For this purpose, we first compute the conductivity and diffusion coefficients in the plasma that is significantly colorful. Then, the time evolution of the color density due to the conductivity and diffusion is studied. The conductivity is shown to be much more efficient than the diffusion in neutralizing the plasma at the scale longer than the screening length. Estimates of the characteristic time scales, which are based on close to global equilibrium computations, suggest that first the plasma becomes white and then the momentum degrees of freedom thermalize.Comment: 9 pages, revised, to appear in Phys. Rev.

An horizontal innovation growth model with endogenous time allocation and non-stable demography

We propose a decentralized endogenous growth model in order to study the transitional dynamics associated with the process of population aging in a small open economy. The model features endogenous time allocation and two growth engines: R&D and human capital accumulation. Per capita output growth is affected negatively by the difference in the rates of growth of labor force and of the total population in the period where the weight of the labor force decreases to a new and lower level. The biggest impact of aging on per capita output growth is during the period where labor force grows at a lower rate than the population unless it is compensated by some other effect. Under some assumptions, a decrease in the corporate tax improves growth.info:eu-repo/semantics/publishedVersio

Life cycles with endogenous time allocation and age-dependent mortality

The negative effect of population aging on the economy can be mitigated by a behavioral effect of people as a reaction to a higher life expectancy. We analyze the optimal life-cycle of individuals that allocate time at the intensive margin between leisure, human capital accumulation, and labor supply while facing an age-dependent mortality. This allows to enhance effects of changes in life expectancy on labor supply and human capital accumulation and to uncover trade-offs between time allocations at different stages of the life-cycle. Our life-cycles are characterized by on the job training throughout all the working life with a possibility of a temporary exit from the labor market. We simulate the model numerically and find that with a higher life expectancy, labor supply increases at the intensive margin and the individual invests more in human capital. We also find a willingness to increase labor supply at the extensive margin.info:eu-repo/semantics/publishedVersio

How should we measure the return on public investment in a VAR

Pereira’s (2000) method of computing the return on public investment in a VAR is extended. A new return measure which accounts for public and private costs is proposed. An application to US data shows non-trivial differences between alternative return rates.Public investment;rate of return;VAR.

Local equilibrium of the quark-gluon plasma

Within kinetic theory, we look for local equilibrium configurations of the quark-gluon plasma by maximizing the local entropy. We use the well-established transport equations in the Vlasov limit, supplemented with the Waldmann-Snider collision terms. Two different classes of local equilibrium solutions are found. The first one corresponds to the configurations that comply with the so-called collisional invariants. The second one is given by the distribution functions that cancel the collision terms, representing the most probable binary interactions with soft gluon exchange in the t-channel. The two sets of solutions agree with each other if we go beyond these dominant processes and take into account subleading quark-antiquark annihilation/creation and gluon number non-conserving processes. The local equilibrium state appears to be colorful, as the color charges are not locally neutralized. Properties of such an equilibrium state are analyzed. In particular, the related hydrodynamic equations of a colorful fluid are derived. Possible neutralization processes are also briefly discussed.Comment: 20 pages; minor changes, to be published in Phys. Rev.

Hard-Loop Effective Action for Anisotropic Plasmas

We generalize the hard-thermal-loop effective action of the equilibrium quark-gluon plasma to a non-equilibrium system which is space-time homogeneous but for which the parton momentum distribution is anisotropic. We show that the manifestly gauge-invariant Braaten-Pisarski form of the effective action can be straightforwardly generalized and we verify that it then generates all n-point functions following from collisionless gauge-covariant transport theory for a homogeneous anisotropic plasma. On the other hand, the Taylor-Wong form of the hard-thermal-loop effective action has a more complicated generalization to the anisotropic case. Already in the simplest case of anisotropic distribution functions, it involves an additional term that is gauge invariant by itself, but nontrivial also in the static limit.Comment: 12 pages. Version 3: typo in (15) corrected, note added discussing metric conventions use