surveyed by the National Business Incubation Association in 2006 reported that they also served affiliate or virtual clients. These companies do not reside in the incubator facility. Affiliate clients may be home-based businesses or early-stage companies that have their own premises but can benefit from incubator services. Virtual clients may be too remote from an incubation facility to participate on site, and so receive counseling and other assistance electronically. The amount of time a company spends in an incubation program can vary widely depending on a number of factors, including the type of business and the entrepreneur's level of business expertise. Life science and other firms with long research and development cycles require more time in an incubation program than manufacturing or service companies that can immediately produce and bring a product or service to market. On average, incubator clients spend 33 months in a program. Many incubation programs set graduation requirements by development benchmarks, such as company revenues or staffing levels, rather than time. Eligibility Admission process Intellectual property Seed loan Infrastructure Common infrastructure Other services Periodic assessment Information submission Consideration Tenure in BI Exit Conflicts of interests and confidentiality of information Disclaimer Agreements Goals and sponsors Business incubation has been identified as a means of meeting a variety of economic and socioeconomic policy needs, which may include job creation, fostering a community's entrepreneurial climate, technology commercialization, diversifying local economies, building or accelerating growth of local industry clusters, business creation and retention, encouraging minority entrepreneurship, identifying potential spin-in or spin-out business opportunities, or community revitalization. About one-third of business incubation programs are sponsored by economic development organizations. Government entities (such as cities or counties) account for 21% of program sponsors. Another 20% are sponsored by academic institutions, including two- and four-year colleges, universities, and technical colleges. In many countries, incubation programs are funded by regional or national governments as part of an overall economic development strategy. In the United States, however, most incubation programs are independent, community-based and resourced projects. The U.S. Economic Development Administration is a frequent source of funds for developing incubation programs, but once a program is open and operational it typically receives no federal funding; few states offer centralized incubator funding. Rents and/or client fees account for 59% of incubator revenues, followed by service contracts or grants (18%) and cash operating subsidies (15%). As part of a major effort to address the ongoing economic crisis