Adopted on September 8 of 2000, the United Nations Millennium Declaration stated as its first goal that countries "...[further] resolve to halve, by the year 2015, the proportion of the world's people whose income is less than one dollar a day and the proportion of people who suffer from...

Using panel datasets from Mexico and Chile for the 2000s, we examine the determinants of middle-class intra-generational mobility. We define the middle class by means of a latent index of economic wellbeing that is less sensitive to short-term fluctuation and measurement error than standard...