This note presents a simple model to measure the relative economic growth of economic systems. The model considers S-Shaped pattern of economic growth which represented with a linear model provides information on how an economic system growth in comparison with another one. In particular, this...

We use aggregate GDP data and within-country income shares for the period 1970-1998 to assign a level of income to each person in the world. We then estimate the gaussian kernel density function for the worldwide distribution of income. We compute world poverty rates by integrating the density...