introduction:  image  distortion  is  one  of  the  major  problems  of  magnetic  resonance  imaging  (mri) for use in 3dmri, velocity mri, fmri and radiotherapy treatment planning (rttp). it is  widely known that the most obvious effect of the inhomogenity of the magnetic fields and the  nonlinearity  of  the  gradient  is  the  geometric  distortion  of  mr  tomograms.  in  this  study,  the...

Social security plays an essential role in an economy, but if designed incorrectly can distort the labor supply and savings behavior of individuals in the economy. We explore how well the Australian means-tested pension system provides social insurance by calculating possible welfare gains from changing the settings in the current means-tested pension system. This work has been explored by othe...

This paper simulates the effects of three increasingly bolder reforms in the Colombian social protection system: the equalization of salaried and self-employed labor contributions; the removal of payroll taxes, parafiscales; and the complete delinking of social protection benefits from labor status. We collect nationally representative information concerning individual willingness to pay for se...

We present a new dataset with 15 indicators for the political, economic and social impact of colonialism. This dataset and our four indices for the impact of colonialism create for the first time the opportunity to compare directly the levels of colonial transformation for a sample of 83 African and Asian countries. Some of our exploratory findings on the interrelation of the dimensions show th...