Code and Data for: Measuring Upward Mobility

<pre>We conceptualize and measure upward mobility over income or wealth. <br>At the core of our exercise is the Growth Progressivity Axiom: transfers of instantaneous growth rates from relatively rich to poor individuals increases upward mobility. This axiom, along with mild auxiliary restrictions, identifies an ``upward mobility kernel" with a single free parameter, in which mobility is linear in individual growth rates, with geometrically declining weights on baseline incomes. We extend this kernel to trajectories over intervals. <br>The analysis delivers an upward mobility index that does not rely on panel data. That significantly expands our analytical scope to data-poor settings.</pre><br>