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6. Nonprofit Research Databases
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NCCS Core Files & IRS Return Transaction Files (Core)
Items
Core & CoreTrend Files: Getting Started
Core 1998 PC File: LEGEXP (Schedule A, Part III, L1: lobbying expenses). (Technical Note).
Core file circa periods - definition and background
Core Private Foundations file: Field Names for 2001 IRS F990PF
Core Public Charities & Non-c3 file: Form 990 with Field Names (Helpful Hint)
Core Public Charities and Non-c3 file: Field Names for 1996 IRS F990
Creating and Verifying Core File Data
Missing Core "C-Other" Files in the early 1990s are missing some names, states, and zipcodes (Technical Note)
NCCS Core Supplement (aka: Super Core)
Core Files: Assessing Their Accuracy & Building a Longitudinal File for Trend Analysis (Technical Note / Method Note)
Core(PF)- SOI variable crosswalk (Helpful Hint)
Data issues in the 501(c) "other" Core files (Technical Note)
Foundation Center Grantmaking Foundations by State: Why do totals vary from NCCS Core files? (FAQ)
New financial data available in BMF - Core financial information added October 2006
RTF special extracts (Technical Note)
Start and fiscal years (STYEAR and FISYR) in the Core files (Technical Note)
Where is the Core 1993 PF File? (FAQ)
