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    "claim": "About 85% of advance refundings occur at an NPV loss, with aggregate losses exceeding $15 billion",
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    "claim": "More than 96% of refundings give short-term cash flow savings, averaging 141 bp of par",
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    "claim": "Even if the implicit option is ignored, over half of refundings occur at a loss",
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    "claim": "Refunding activity responds to potential cash flow savings but not to potential NPV",
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   {
    "claim": "Refunding activity rises with tax revenue shortfalls and budget deficits",
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   {
    "claim": "NPV losses grow as tax collections fall and unfunded pension liabilities rise",
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   {
    "claim": "Potential cash flow savings drive the cross-sectional probability of refunding",
    "evidence_type": "table",
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   {
    "claim": "Average refunding NPV is negative in all 50 states, with heterogeneity across states",
    "evidence_type": "table",
    "evidence_ref": "Table IX"
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  "structural_summary": "The paper opens with the rapid growth of advance refundings and frames each one as an early synthetic call akin to American option exercise. It sets out an optimal-refunding valuation framework and gives a case study of political context. It then values over 206,000 transactions and documents widespread NPV losses alongside short-term cash flow savings. Alternative frictions (covenants, informational problems) are ruled out. Aggregate time-series and cross-sectional probit regressions link refunding activity to fiscal constraints. The conclusion restates the findings and discusses which other parties benefit from suboptimal refundings.",
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