Thesis (Ph.D.)--Columbia University, 2007. / Advisers: Awi Federgruen, Alp Muharremoglu. Includes bibliographical references.

Thesis (Ph. D.)--Ohio State University, 2008. / Title from first page of PDF file. Includes bibliographical references (p. 364-398).

This study investigated and examined the effectiveness and implementation of the existing internal controls designed specifically for exempted micro-enterprises (EMEs) contracting with the South African Social Security Agency (SASSA), in order to minimise the risk of possible tax evasion within the supply-chain management (SCM) processes. The research was completed by conducting a document review and face-to-face interviews with SASSA‟s SCM practitioners, risk manager, fraud and corruption manager, internal-control manager and internal auditor in order to identify risks of possible tax evasion within the SCM processes. It was concluded that there is a risk of possible tax evasion within the SCM processes due to the ineffectiveness and inconsistent implementation of internal controls designed for EMEs contracting with SASSA. This risk could be minimised by incorporating possible anti-tax-evasion procedures in the risk-assessment process, and ultimately in SASSA‟s broader fraud and corruption strategies. Such procedures should then help minimise funds being lost to the fiscus due to tax evasion in the SCM processes. / Taxation / M. Phil. (Accounting Sciences)