Labour Taxes and Work Hours in Australia

In the 1970s, work hours in Europe were similar to work hours in America, but today Europeans work less than Americans. Prescott (2004) attributes the decline in European work hours to an increase in the effective marginal tax rate on labour income. The Australian labour market experience confirms that the taxation of labour income is an important determinant of the decision to work. In Australia taxes and work hours did not change much in the long-run, but Australian work hours rebounded after a temporary increase in taxes in the 1980s. The resilience of Australian work hours suggests that a return to the tax rates of the 1970s would restore the European labour supply.

A First Search for coincident Gravitational Waves and High Energy Neutrinos using LIGO, Virgo and ANTARES data from 2007

We present the results of the first search for gravitational wave bursts associated with high energy neutrinos. Together, these messengers could reveal new, hidden sources that are not observed by conventional photon astronomy, particularly at high energy. Our search uses neutrinos detected by the underwater neutrino telescope ANTARES in its 5 line configuration during the period January - September 2007, which coincided with the fifth and first science runs of LIGO and Virgo, respectively. The LIGO-Virgo data were analysed for candidate gravitational-wave signals coincident in time and direction with the neutrino events. No significant coincident events were observed. We place limits on the density of joint high energy neutrino - gravitational wave emission events in the local universe, and compare them with densities of merger and core-collapse events.Comment: 19 pages, 8 figures, science summary page at http://www.ligo.org/science/Publication-S5LV_ANTARES/index.php. Public access area to figures, tables at https://dcc.ligo.org/cgi-bin/DocDB/ShowDocument?docid=p120000