Gender Differences in Competition Emerge Early in Life

We study gender differences in the willingness to compete in a large-scale experiment with 1,035 children and teenagers, aged three to eighteen years. Using an easy math task for children older than eight years and a running task for the younger ones we find that boys are much more likely to enter a tournament than girls across the whole age spectrum considered here. This gender gap is observed already with three-year olds, indicating that gender differences in competitiveness emerge very early in life. The gap is robust to controlling for gender differences in risk attitudes and overconfidence.competition, gender gap, experiment, children, teenagers

Entry and Exit of Physicians in a two-tiered public/private Health Care System

Firm turnover has recently attracted increased interest in economic research. The entry of new firms increases competition and promises efficiency gains. Moreover, changes in the market structure influence productivity growth, because firm entry usually leads to increased innovation. The health care market exhibits important differences as compared to other markets, including various forms of market failure and, as a consequence, extensive market regulation. Thus, the economic effects of entries and exits in health care markets are less obvious. The following paper studies the determinants of entry and exit decisions of physicians in the private sector of the outpatient part of the Austrian health care system. We apply a Poisson panel estimation to a data set of 2,379 local communities and 121 districts in Austria in the time period 2002 - 2008. We are particularly interested in the question how public physicians (GPs/specialists) and their private counterparts influence the entrance and exit of private physicians. We find a significantly negative effect of existing capacities, measured by both private and public physician density of the same specialty, on the entry of new private physicians. On the contrary, we find a significantly positive effect of private GPs on the entry of private specialists. Interestingly, this cooperation/network effect also works in the other direction, as a higher density of private specialists increases the probability of the market entry of private GPs. Based on the results of previous literature, we thus conclude that private physicians establish networks to cooperate in terms of mutual referrals etc. Our estimations for market exits basically confirm the entry results, as higher competitive forces positively influence the market exit of private physicians.Entry, Exit, Health Care, Physician location

Structural Breaks in Inflation Dynamics within the European Monetary Union

To assess the effects of the EMU on inflation rate dynamics of its member states, the inflation rate series for 21 European countries are investigated for structural changes. To capture changes in mean, variance, and skewness of inflation rates, a generalized logistic model is adopted and complemented with structural break tests and breakpoint estimation techniques. These reveal considerable differences in the patterns of inflation dynamics and the structural changes therein. Overall, there is a convergence towards a lower mean inflation rate with reduced skewness, but it is accompanied by an increase in variance.inflation rate, structural break, EMU, generalized logistic distribution

Experimental Test of Bell inequalities with Six-Qubit Graph States

We report on the experimental realization of two different Bell inequality tests based on six-qubit linear-type and Y-shape graph states. For each of these states, the Bell inequalities tested are optimal in the sense that they provide the maximum violation among all Bell inequalities with stabilizing observables and possess the maximum resistance to noise.Comment: 4 pages, 2 figure

Thar she bursts - Reducing confusion reduces bubbles

To explore why bubbles frequently emerge in the experimental asset market model of Smith, Suchanek and Williams (1988), we vary the fundamental value process (constant or declining) and the cash-to-asset value-ratio (constant or increasing). We observe high mispricing in treatments with a declining fundamental value, while overvaluation emerges when coupled with an increasing C/A-ratio. A questionnaire reveals that the declining fundamental value process confuses subjects, as they expect the fundamental value to stay constant.Running the experiment with a different context (“stocks of a depletable gold mine” instead of “stocks”) significantly reduces mispricing and overvaluation as it reduces confusion.Experimental economics, asset market, bubble, market efficiency, confusion

Klein tunneling and Dirac potentials in trapped ions

We propose the quantum simulation of the Dirac equation with potentials, allowing the study of relativistic scaterring and the Klein tunneling. This quantum relativistic effect permits a positive-energy Dirac particle to propagate through a repulsive potential via the population transfer to negative-energy components. We show how to engineer scalar, pseudoscalar, and other potentials in the 1+1 Dirac equation by manipulating two trapped ions. The Dirac spinor is represented by the internal states of one ion, while its position and momentum are described by those of a collective motional mode. The second ion is used to build the desired potentials with high spatial resolution.Comment: 4 pages, 3 figures, minor change