Joshua Rauh, Professor of Finance at Stanford University's Graduate School of Business and a senior fellow at Stanford University's Hoover Institution, talks with EconTalk host Russ Roberts about the unfunded liabilities from state employee pensions. The publicly stated shortfall in revenue relative to promised pensions is about $1 trillion. Rauh estimates the number to be over $4 trillion. Rauh explains why that number is more realistic, how the problem grew in recent years, and how the fiscal situation might be fixed moving forward. He also discusses some of the political and legal choices that we are likely to face going forward as states face strained budgets from promises made in the past to retired workers.