Modeling Interjurisdictional Tax Competition in a Federal System

Interjurisdictional tax competition is a controversial theme little studied in an empirical approach in spite of the great advance in the theoretical debate at last decades. This paper aims to build a bridge between such theoretical issues and the empirical tools using an interregional general equilibrium model to evaluate the welfare effects of an experimental game of tax competition between two regional governments of the Brazilian federal system. The model recognizes the horizontal and vertical fiscal linkages underlying the Brazilian federalism. The results imply in a welfare-improving Nash equilibrium, in opposition with many theoretical issues. It can be seen that the fiscal externalities of tax competition does matter for such output not only due the mobility of the regional tax base but also because the substitution effect between regional goods and international goods since tax competition reduces the domestic prices. Additionally, the constitutional rules impose a rigid mechanism of fiscal transfers from central government to regional governments and contribute to alleviate the reduction pressures on the regional public goods because the increase in central government's tax base also increase the regional government revenues. Then, interjurisdicional tax competition in the Brazilian federal system can be associated with gains in private consumption that overcome the reduction in regional public good provisions, reinforcing the welfare-improving equilibrium

Modeling Interjurisdictional Tax Competition in a Federal System

Interjurisdictional tax competition is a controversial theme little studied in an empirical approach in spite of the great advance in the theoretical debate at last decades. This paper aims to build a bridge between such theoretical issues and the empirical tools using an interregional general equilibrium model to evaluate the welfare effects of an experimental game of tax competition between two regional governments of the Brazilian federal system. The model recognizes the horizontal and vertical fiscal linkages underlying the Brazilian federalism. The results imply in a welfare-improving Nash equilibrium, in opposition with many theoretical issues. It can be seen that the fiscal externalities of tax competition does matter for such output not only due the mobility of the regional tax base but also because the substitution effect between regional goods and international goods since tax competition reduces the domestic prices. Additionally, the constitutional rules impose a rigid mechanism of fiscal transfers from central government to regional governments and contribute to alleviate the reduction pressures on the regional public goods because the increase in central government’s tax base also increase the regional government revenues. Then, interjurisdicional tax competition in the Brazilian federal system can be associated with gains in private consumption that overcome the reduction in regional public good provisions, reinforcing the welfare-improving equilibrium.

Phosphodiesterase Type 5 Inhibitors and Visual Side Effects: A Narrative Review

Phosphodiesterase type 5 inhibitors such as sildenafil citrate and tadalafil are well known for the treatment of erectile dysfunction. However, their use in the presence of pulmonary hypertension can cause ophthalmologic side effects, including non-arteritic optic ischemic neuropathy, chorioretinopathy, glaucoma, and optic atrophy. The present review aimed to identify these visual side effects and provide recommendations. We identified articles published from January 2000 to March 2019 on diseases arising from the management of sexual dysfunction in urology or pulmonary hypertension in pneumonia that could cause pathologic alterations in eye structure based on a literature search of the MEDLINE electronic database using keywords for the most common adverse effects and different kinds of phosphodiesterase 5 inhibitors. After applying the exclusion criteria, we selected 36 of the 77 articles initially identified to write the narrative review and added 20 additional articles to completely describe the pathological entities. Phosphodiesterase type 5 inhibitors can cause side effects in the eye including ocular surface abnormalities, increased intraocular pressure and glaucoma, uveitis, non-arteritic ischemic neuropathy, chorioretinopathy, retinal occlusion, and visual field changes. There is an increased need for well-performed studies to better understand these side effects, which are common due to the wide use of sildenafil

Dynamic Entry and Exit Linkages in the Brazilian Manufacturing Industry: An Econometric Investigation

The paper investigates dynamic linkages between entry and exit rates in Brazilian manufacturing in the context of 231 (4-digits) industries during the 1996-2005 period. The empirical analysis focuses on the estimation of a dynamic panel data for entry and exit rates and controls for the business cycle. The empirical evidence is consistent with a multiplier effect where synergetic factors prevail either by entry inducing entry or by exit inducing exit. Evidence partially supports a competition effect that could be related to a selection process favouring efficiency, as exit induces entry. The business cycle control variable appears to play no role. The results are similar, though not identical to previous evidence for developed countries

Inducing energy gaps in graphene monolayer and bilayer

In this paper we propose a mechanism for the induction of energy gaps in the spectrum of graphene and its bilayer, when both these materials are covered with water and ammonia molecules. The energy gaps obtained are within the range 20-30 meV, values compatible to those found in experimental studies of graphene bilayer. We further show that the binding energies are large enough for the adsorption of the molecules to be maintained even at room temperature

Stellate Ulceration in a Nonuremic Patient

info:eu-repo/semantics/publishedVersio

Life Cycle Assessment of Electrodialytic Technologies to Recover Raw Materials from Mine Tailings

UIDB/04085/2020 PD/BD/135170/2017Currently, the development of new sustainable technologies to recover raw materials from secondary resources has shown a lack of available data on the processes and supplies involved, as well as their environmental impacts. The present research has conducted a life cycle assessment of electrodialytic (ED) technologies to improve critical raw materials recovery in the Portuguese mining industry. To critically appraise the activities from the mining sector and gather data on technical and environmental issues, three waste management scenarios were considered: (1) ED treatment with a deep eutectic solvent as an adjuvant; (2) ED treatment with simultaneous H2 recovery; and (3) ED treatment with sodium chloride as an enhancement. The data presented were based on global databases, technical reports from official sources, and peer-reviewed published experimental outcomes. The estimated results indicated that one of the constraints in applying ED technologies is energy consumption and thus the impacts are highly dependent on energy source choices. On the other hand, as a consequence of the H2 inherently produced by ED technologies, there is a direct potential for energy recovery. Therefore, considering an upscale approach of the ED reactor based on bench scale experimental results, the H2 could be reused in the ED facility or stored. Additionally, according to experimental data, 22% of the tungsten from the fine mine tailings could be recovered. Finally, the possibility to remove 63% of arsenic from mine tailings could decrease contamination risks while creating additional marketable co-products.publishersversionpublishe

Ultrasound-assisted electrodialytic separation of cobalt from tungsten carbide scrap powder

Funding Information: Fundação para a Ciência e a Tecnologia is also acknowledged for P. Guedes Contract established under Individual Call to Scientific Employment Stimulus (CEECIND/01969/2020). The US Strategic Environmental Research and Development Program (project ER19-1130); the Superfund Research Program of the National Institute of Environmental Health Sciences (NIEHS, National Institutes of Health) (NIH; grant number P42ES017198). João P. Veiga from CENIMAT/I3N at FCT NOVA is also acknowledged for the XRF analysis. This research is anchored at RESOLUTION LAB, an infrastructure at NOVA School of Science and Technology. Publisher Copyright: © 2024 The AuthorsRecycling of tungsten carbide-cobalt (WC–Co) will considerably grow in the future. Thus, efficient and greener methods for the recovery of the critical raw materials, Co and W, will be necessary. In this work, we evaluate the separation of Co from WC using an electrodialytic (ED) process alone and coupled with ultrasound-assisted extraction (UAE). The WC-Co powder was suspended in different leaching agents, and the effects of UAE amplitude (probe system), pulse periods, and treatment time were evaluated. The Co extraction was mainly dependent on the leaching agent when only UAE was applied, being more efficient under acidic pH. The ED process, alone and coupled to UAE, was then applied using a reactor with two compartments separated by a cation exchange membrane with nitric acid as anolyte; and the effect of DC intensity was tested for Co separation from WC. Between 24 % and 58 % of Co were solubilized when ED was applied alone, but these values increased up to 96 % through the combination with UAE. The ED process was also applied without the use of nitric acid, taking advantage of the acid generated through water electrolysis, aiming for a more environmentally friendly process. The best Co selective recovery was achieved when ED-UAE was used, reaching 99 % of Co solubilization and 90 % of the total Co electromigration to the cathode compartment, leaving behind the WC residue at the anode. The ED-UAE process presents as a greener process for Co separation from WC residues, with further tests needed to include W recovery.publishersversionpublishe

Cost-Effectiveness of Routine Screening for Cardiac Toxicity in Patients Treated with Imatinib in Brazil

AbstractWe performed a cost-effectiveness study of different strategies of screening for cardiotoxicity in patients receiving imatinib, the first strategy based on yearly echocardiograms in all patients and the second strategy based on yearly B-type natriuretic peptide level measurement, reserving echocardiograms for patients with an abnormal test result. Results are presented in terms of additional cost per diagnosis as compared with not performing any screening. From the Brazilian private sector’s perspective, strategies 1 and 2 resulted in additional costs of US $30,951.53 and US$19,925.64 per diagnosis of cardiotoxicity, respectively. From the perspective of the Brazilian public health system, the same strategies generated additional costs of US $7,668.00 and US$20,232.87 per diagnosis, respectively. In our study, systematic screening for cardiotoxicity in patients using imatinib has a high cost per diagnosis. If screening is to be adopted, a strategy based on B-type natriuretic peptide level measurement, reserving echocardiography for patients with abnormal results, results in lower costs per diagnosis in the private sector. From the public health system’s perspective, costs per diagnosis will greatly depend on the reimbursement values adopted for B-type natriuretic peptide level measurement