:  Sanches I, Sobel J
:  Hierarchical design and enforcement of income tax policies
:  
:  1993
:  
:  Journal of Public Economics
:  Vol. 50
:  Sanches I., Sobel J. Hierarchical design and enforcement of income tax policies // Journal of Public Economics. 1993. Vol. 50. P. 345 369.
:  



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