The number of motivating constituents studied in the last decade, and considered to be important in defining the entrepreneur, are likely to vary with the researcher investigating the question. Roberts in examining technically oriented entrepreneurs for example, lists three primary causes,(a) independence, (b) challenge, and (c) monetary reasons, very low on the list, as being crucial to an entrepreneur. But Feeser and Dugan have determined that four factors, distilled from eleven motivated statements, are able to set out the parameters that make up the motivation to become entrepreneurial: