The Combined Effect of Salary Restrictions and Revenue Sharing on Club Profits, Player Salaries, and Competitive Balance

This article provides a standard "Fort and Quirk"-style model of a professional team sports league and analyzes the combined effect of salary restrictions (caps and floors) and revenue-sharing arrangements. It shows that the invariance proposition does not hold even under Walrasian conjectures if revenue sharing is combined with either a salary cap or a salary floor. In leagues with a binding salary cap for large clubs but no binding salary floor for small clubs, revenue sharing will decrease the competitive balance and increase club profits. Moreover, a salary cap produces a more balanced league and decreases the cost per unit of talent. The effect of a more restrictive salary cap on the profits of the small clubs is positive, whereas the effects on the profits of the large clubs as well as on aggregate profits are ambiguous. In leagues with a binding salary floor for the small clubs but no binding salary cap for the large clubs, revenue sharing will increase the competitive balance. Moreover, revenue sharing will decrease (increase) the profits of large (small) clubs. Implementing a more restrictive salary floor produces a less balanced league and increases the cost per unit of talent. Furthermore, a salary floor will result in lower profits for all clubs.Team sports leagues, invariance proposition, competitive balance, revenue sharing, salary cap, salary floor

Welfare Effects of Salary Caps in Sports Leagues with Win-Maximizing Clubs

This paper studies the welfare effect of a percentage-of-revenue salary cap in a European context with win-maximizing clubs. It shows that a percentage-of-revenue cap increases competitive balance and decreases the overall salary payments in the league, therefore contributing to financial stability. A percentage-of-revenue cap will always increase social welfare if the weight on aggregate club surplus in the welfare function is sufficiently high. Additionally, if fans’ preferences for aggregate talent are sufficiently high then the percentage-of-revenue cap will also increase social welfare; no matter how much weight the league puts on financial stability.Salary Caps, Social Welfare, Competitive Balance, Team Sports League

Organizational Differences between U.S. Major Leagues and European Leagues: Implications for Salary Caps

This paper outlines and compares the organizational structure of major sports leagues, explores the reasoning behind their formation, and derives implications for salary caps in European football. To understand why sports leagues have developed a specific organizational structure, one must take the economic peculiarities of team sports leagues into consideration. For this purpose, we analyze the production process and illuminate its major peculiarities. For example, we present the difference between economic competition and competition on the pitch and discuss the consequences of this distinction for an attractive final product. Furthermore, we show that a hold-up problem exists between the two stages of the production process and demonstrate how these problems are overcome by the organizational structure chosen by sports leagues. We also outline the differences between the U.S. major leagues and European leagues and document recent developments in that context. Finally, based on this comparative institutional analysis, we derive implications for the introduction of salary caps into European football.Sports leagues, organization, salary cap, hold-up problem

The Effect of Salary Caps in Professional Team Sports on Social Welfare

This paper provides a theoretical model of a team sports league and studies the welfare effect of salary caps. It shows that salary caps will increase competitive balance and decrease overall salary payments within the league. The resulting effect on social welfare is counter-intuitive and depends on the preference of fans for aggregate talent and for competitive balance. A salary cap that binds only for large-market clubs will increase social welfare if fans prefer aggregate talent despite the fact that the salary cap will result in lower aggregate talent. If fans prefer competitive balance, on the other hand, any binding salary cap will reduce social welfar

On the nature of ferromagnetism in diluted magnetic semiconductors: GaAs:Mn, GaP:Mn

A microscopic Hamiltonian for interacting manganese impurities in diluted magnetic semiconductors (DMS) is derived. It is shown that in p -type III-V DMS the indirect exchange between Mn impurities has similarities with the Zener mechanism in transition metal oxides. Here the mobile holes and localized states near the top of the valence band play the role of unoccupied oxygen orbitals which induce ferromagnetism. The Curie temperature estimated from the proposed kinematic exchange agrees with recent experiments on GaAs:Mn. The model is also applicable to the GaP:Mn system.Comment: 10 pages, 3 figures. Submitted to Europhysics Letters, June 25, 200

SuRe:food – ein Bewertungstool für regional wirksame Nachhaltigkeitseffekte von Lebensmittelwertschöpfungsketten

SuRe:food ist ein Tool, das Nachhaltigkeit mit dem Konzept der Regionalität verknüpft und so eine Bewertung ganzer Lebensmittelwertschöpfungsketten ermöglicht. In diesem Beitrag wird der methodische Rahmen vorgestellt und seine Anwendung anhand von vier Bio-Produkten in Österreich illustriert

Skeletal muscle alterations in tachycardia-induced heart failure are linked to deficient natriuretic peptide signalling and are attenuated by RAS-/NEP-inhibition

Background Heart failure induced cachexia is highly prevalent. Insights into disease progression are lacking. Methods Early state of left ventricular dysfunction (ELVD) and symptomatic systolic heart failure (HF) were both induced in rabbits by tachypacing. Tissue of limb muscle (LM) was subjected to histologic assessment. For unbiased characterisation of early and late myopathy, a proteomic approach followed by computational pathway-analyses was performed and combined with pathway-focused gene expression analyses. Specimen of thoracic diaphragm (TD) served as control for inactivity-induced skeletal muscle alterations. In a subsequent study, inhibition of the renin-angiotensin-system and neprilysin (RAS-/NEP) was compared to placebo. Results HF was accompanied by loss of protein content (8.7±0.4% vs. 7.0±0.5%, mean±SEM, control vs. HF, p<0.01) and a slow-to-fast fibre type switch, establishing hallmarks of cachexia. In ELVD, the enzymatic set-up of LM and TD shifted to a catabolic state. A disturbed malate-aspartate shuttle went well with increased enzymes of glycolysis, forming the enzymatic basis for enforced anoxic energy regeneration. The histological findings and the pathway analysis of metabolic results drew the picture of suppressed PGC-1α signalling, linked to the natriuretic peptide system. In HF, natriuretic peptide signalling was desensitised, as confirmed by an increase in the ratio of serum BNP to tissue cGMP (57.0±18.6pg/ml/nM/ml vs. 165.8±16.76pg/ml/nM/ml, p<0.05) and a reduced expression of natriuretic peptide receptor-A. In HF, combined RAS-/NEP-inhibition prevented from loss in protein content (8.7±0.3% vs. 6.0±0.6% vs. 8.3±0.9%, Baseline vs. HF-Placebo vs. HF-RAS/NEP, p<0.05 Baseline vs. HF-Placebo, p = 0.7 Baseline vs. HF-RAS/NEP). Conclusions Tachypacing-induced heart failure entails a generalised myopathy, preceding systolic dysfunction. The characterisation of “pre-cachectic” state and its progression is feasible. Early enzymatic alterations of LM depict a catabolic state, rendering LM prone to futile substrate metabolism. A combined RAS-/NEP-inhibition ameliorates cardiac-induced myopathy independent of systolic function, which could be linked to stabilised natriuretic peptide/cGMP/PGC-1α signalling

Long-term decoding of movement force and direction with a wireless myoelectric implant

Objective. The ease of use and number of degrees of freedom of current myoelectric hand prostheses is limited by the information content and reliability of the surface electromyography (sEMG) signals used to control them. For example, cross-talk limits the capacity to pick up signals from small or deep muscles, such as the forearm muscles for distal arm amputations, or sites of targeted muscle reinnervation (TMR) for proximal amputations. Here we test if signals recorded from the fully implanted, induction-powered wireless Myoplant system allow long-term decoding of continuous as well as discrete movement parameters with better reliability than equivalent sEMG recordings. The Myoplant system uses a centralized implant to transmit broadband EMG activity from four distributed bipolar epimysial electrodes. Approach. Two Rhesus macaques received implants in their backs, while electrodes were placed in their upper arm. One of the monkeys was trained to do a cursor task via a haptic robot, allowing us to control the forces exerted by the animal during arm movements. The second animal was trained to perform a center-out reaching task on a touchscreen. We compared the implanted system with concurrent sEMG recordings by evaluating our ability to decode time-varying force in one animal and discrete reach directions in the other from multiple features extracted from the raw EMG signals. Main results. In both cases, data from the implant allowed a decoder trained with data from a single day to maintain an accurate decoding performance during the following months, which was not the case for concurrent surface EMG recordings conducted simultaneously over the same muscles. Significance. These results show that a fully implantable, centralized wireless EMG system is particularly suited for long-term stable decoding of dynamic movements in demanding applications such as advanced forelimb prosthetics in a wide range of configurations (distal amputations, TMR).German Federal Ministry for Education and Reseach (BMBF) grant No, 16SV3695, 16SV3699, 16SV3697 and 01GQ1005C, DFG Deutsche Forschungsgemeinschaft grant No. GA1475-C

Collective electronic excitation in a trapped ensemble of photogenerated dipolar excitons and free holes revealed by inelastic light scattering

Photogenerated excitonic ensembles confined in coupled GaAs quantum wells were probed by a complementary approach of emission spectroscopy and resonant inelastic light scattering. Lateral electrostatic trap geometries were used to create dense systems of spatially indirect excitons and excess holes with similar densities in the order of 10(11) cm(-2.) Inelastic light scattering spectra reveal a very sharp low-lying collective mode that is identified at an energy of 0.44 meV and a full width at half maximum of only similar to 50 mu eV. This mode is interpreted as a plasmon excitation of the excess hole system coupled to the photogenerated indirect excitons. The emission energy of the indirect excitons shifts under the application of a perpendicular applied electric field, with the quantum-confined Stark effect unperturbed from the presence of free charge carriers. Our results illustrate the potential of studying low-lying collective excitations in photogenerated exciton systems to explore the many-body phase diagrams, related phase transitions, and interaction physics

Spatial distribution and morphological responses to predation in the salt marsh periwinkle

The salt marsh periwinkle (Littoraria irrorata) is a common and often abundant mollusk in marshes of the Gulf and Atlantic coasts of the United States. Several studies have focused on the effects of periwinkles on Spartina alterniflora production and the effects of oil on periwinkle survivability, yet the general ecology of the snail has been underreported. In this study, we measured spatial distributions, biomass, shell repair frequency, and a suite of morphological characteristics of L. irrorata at three sites in each of five regions spanning the southeastern Louisiana Coast between the Atchafalaya and Mississippi rivers. Sampling was conducted along 50 m edge-to-interior transects in S. alterniflora-dominated marshes. We found that L. irrorata density, individual biomass, and total areal biomass significantly varied by region. Each also significantly varied with distance from the marsh edge, with the exception of total periwinkle areal biomass. We saw a general trend across most regions where periwinkle density tended to be greatest 10 m from the marsh edge and biomass tended to be greatest 20-30 m from the marsh edge; however, neither periwinkle density nor biomass was related to S. alterniflora density or stem height. The allometric relationship between shell length and biomass varied significantly between all regions, indicating that this species has differing regional growth patterns. A possible driver of these regional patterns in allometry is differences in predation pressures, with increased predation scaring at Port Fourchon sites corresponding to snails with larger shells yet less internal biomass per length compared to other regions. This study provides the first large-scale description of the spatial ecology and regional morphometry of the salt marsh periwinkle, an important organism in structuring salt marsh ecosystems, and suggests that the pressures exerted by L. irrorata on plant production found in other studies likely varies by geography and spatial location within a marsh