Here you can find a fully indexed PDF portfolio containing all research papers presented by members of the Statistics of Income (SOI) Division of the Internal Revenue Service at various conferences and symposia. This PDF will be updated annually. Please note the PDF portfolio requires Adobe Acrobat Reader 9.0 or later for full functionality. A link to download the most current version of Adobe Acrobat Reader is provided below. Full Portfolio of SOI Research Papers PDF (19MB, requires Adobe Acrobat 9.0 or later) Get Adobe Acrobat Reader