Using counterfactual microsimulations, Shapley decompositions of time change in inequality and poverty indices make it possible to disentangle and quantify the relative effect of tax-benefit policy changes, compared to all other effects including shifts in the distribution of market income....

To assess the impact of tax-benefit policy changes on income distribution over time, we suggest a methodology based on counterfactual simulations. We start by decomposing changes in inequality/poverty indices into three contributions: reforms of the tax-benefit structure (rules, rates, etc.),...

Over two centuries, Colombia transferred vast quantities of land, equivalent to the entire UK landmass, mainly to landless peasants. And yet Colombia retains one of the highest concentrations of land ownership in the world. Why? We show that land reform's effects are highly bimodal. Most of...