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- [4] CASE FOR NEGATIVE INCOME-TAX MIDWEST QUARTERLY-A JOURNAL OF CONTEMPORARY THOUGHT, 1978, 19 (03): : 294 - 304
- [8] NEGATIVE INCOME-TAX - INCENTIVE OR DISINCENTIVE RIVISTA INTERNAZIONALE DI SCIENZE ECONOMICHE E COMMERCIALI, 1977, 24 (07): : 608 - 623