During the 1970s and 1980s, many developing countries enacted value-added taxes (VATs) as a part of their fiscal structures. The productivity of this source of revenue has depended in large part on the facility with which the tax can be administered. Single rate VATs have proved easier to...

This paper discusses assessment of income on the basis of approximate indicators as opposed to conventional records. Such a method of assessment, known as presumptive income taxation, is widely used in many developing and industrial countries; however, it has been neglected in public finance...