No Escaping Helium from 55 Cnc e*

Improved precision on the radius of the nearby super - Earth 55 Cnc e

We report on new transit photometry for the super-Earth 55 Cnc e obtained with Warm Spitzer/IRAC at 4.5 μm. An individual analysis of these new data leads to a planet radius of 2.21+0.15 −0.16 R⊕, which agrees well with the values previously derived from the MOST and Spitzer transit discovery data. A global analysis of both Spitzer transit time-series improves the precision on the radius of the...

Stable chaos in the 55 Cnc exoplanetary system ?

The five planets discovered around the main-sequence star 55 Cnc may represent a case of stable chaos. By using both the Frequency Map Analysis and MEGNO we find that about 15 % of the systems that can be build from the nominal orbital elements of the system are highly chaotic. However, in spite of the fast diffusion rate in the phase space, the planetary system is not destabilized over 400 Myr...

Pundit Vol. 55 No. 6

IZA Discussion Paper No. 55

Value-added Tax versus Social Security Contributions In order to alleviate unemployment it is often recommended to reduce social security contributions (SSC) and to compensate for the ensuing loss in revenues by a rise in the value-added tax (VAT). Assuming unemployment to be caused by efficiency wages, it is shown that a balanced-budget shift from a payroll tax to a VAT will increase employmen...

No . 55 Asset Holding and Consumption :

* We thank to the Institute of Household Economy (Kakei-Keizai-Kenkyu-Sho) for providing us micro-level data from the Japanese Panel Survey of Consumption. We also thank to participants at the ESRI seminar. The views expressed in this paper are those of authors' and do not necessarily represent those of the Economic and Social Research Institute or of the Japanese Government. Abstract The 1990s...