Abstract: This paper introduces the multiplicity of official concepts, definitions, and measurements of economic contributions and performance of formal and informal enterprises in India’s manufacturing and services sectors. Conceptually, formal (or informal) enterprises are distinguished by registered (or unregistered), organized (or unorganized), and regulated (or unregulated) enterprises. Employment size is a major criterion to define these enterprises. In contrast, registered and unregistered small scale enterprises are uniquely defined by size of capital investments. Using the national level databases, the economic performance of formal, informal, and small scale enterprises is separately measured by their contributions to production, employment generation, and use of assets in rural and urban areas. This implies that the standardization of concepts and definitions are a precondition for establishing comparability between the databases, or for the measurement of economic contributions and performance of India’s formal and informal enterprises.

Keywords: enterprises, organized, unorganized, informal, registered, unregistered, small scale, own account, directory establishments, non-directory establishments,