Top economists provide much-needed guidance--and some surprising conclusions--in response to rising public concerns about inequality in the U.S. tax system.

Top economists provide much-needed guidance--and some surprising conclusions--in response to rising public concerns about inequality in the U.S. tax system.

Colombia, once a model of fiscal discipline for other Latin American nations, has seen its fiscal situation deteriorate since the early 1990s. Higher government spending, taxes that did not keep pace with expenditures, and severe recession led to an unsustainable debt-to-GDP ratio of 52 percent...